Remove unused code

Deletes code conditional on unused defines
  - SINGLE_FILE_GENERATOR
  - NOT_YET_NEEDED
  - BETA2
  - IMPLEMENT_IVSPERSISTHIERARCHYITEM2
  - IVsOutliningCapableLanguage
  - CUT
  - DISABLED
  - OLDCODE
  - Suggestion4299
  - UNUSED_DEPENDENT_FILES
  - UNUSED_NESTED_PROJECTS
  - NEVER
  - false
  - UNUSED

closes dotnet/fsharp#353

commit 2839aab40f4e3ab434f0738d5c8e3691d7c2c5df
Author: latkin <latkin@microsoft.com>
Date:   Mon Aug 3 17:22:20 2015 -0700

    Fix merge conflict

commit fc4602bf8b60204d85e707db1438f78cc082cb3d
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 18:15:19 2015 +0200

    remove SINGLE_FILE_GENERATOR

commit 2dc0802e76006c6f5dcceae3360325eba01aea6c
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 18:08:21 2015 +0200

    remove NOT_YET_NEEDED

commit df49b75211747dcd4e0ff887ef4473a280bf4a59
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 18:05:56 2015 +0200

    remove BETA2

commit 70858f0689b29638ebfb35e1c3b0aa149895b801
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 18:05:36 2015 +0200

    remove IMPLEMENT_IVSPERSISTHIERARCHYITEM2

commit d5ec2047ed550db9396892bfbdea28b07bc46193
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 18:02:21 2015 +0200

    remove IVsOutliningCapableLanguage

commit 7f78d984171b4ed22da6339c6b799bbd44e743b3
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:55:24 2015 +0200

    remove CUT

commit d781a86012e497dd81fe811250d5efb481c80945
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:54:59 2015 +0200

    remove DISABLED

commit d19d387bd38a0b60e688fe6fa40a24d539d5853d
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:50:06 2015 +0200

    remove OLDCODE

commit 1997a739aa040aa06428f2d225f7d8771b27f938
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:48:02 2015 +0200

    remove Suggestion4299

commit 58cfe73fd9931dfb0276be146dc8d51c04c68c51
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:31:29 2015 +0200

    remove UNUSED_DEPENDENT_FILES

commit 790e49786bb74b1c7a3915ed4b4aaf6243543803
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:19:47 2015 +0200

    remove UNUSED_NESTED_PROJECTS

commit b738f464175e825dad7abdc55ad0e0e20a36545c
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 17:01:08 2015 +0200

    remove NEVER

commit 1f9dea77c2618eeaadec25edced524d51c21b534
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 16:59:43 2015 +0200

    remove false

commit e43fe145b73c81329c1af18744517bef7deb9da4
Author: enricosada <enrico@sada.io>
Date:   Thu Apr 9 16:57:27 2015 +0200

    remove UNUSED

Author: enricosada

src/fsharp/lib.fs

@@ -341,53 +341,6 @@ type Graph<'Data, 'Id when 'Id : comparison and 'Id : equality>
             else List.iter (trace (node.nodeData::path)) node.nodeNeighbours
         List.iter (fun node -> trace [] node) nodes 
 
-#if OLDCODE
-
-    member g.DepthFirstSearch() = 
-        let grey = ref Set.empty 
-        let time = ref 0
-        let forest = ref []
-        let backEdges = ref []
-        let discoveryTimes = ref Map.empty 
-        let finishingTimes = ref Map.empty 
-        nodes |> List.iter (fun n ->  
-            // build a dfsTree for each node in turn 
-            let treeEdges = ref []
-            let rec visit n1 = 
-                incr time;
-                grey := Set.add n1.nodeId !grey;
-                discoveryTimes := Map.add n1.nodeId !time !discoveryTimes;
-                for n2 in n1.nodeNeighbours do
-                    if not ((!grey).Contains n2.nodeId) then 
-                        treeEdges := (n1.nodeId,n2.nodeId) :: !treeEdges;
-                        visit(n2)
-                    else 
-                        backEdges := (n1.nodeId,n2.nodeId) :: !backEdges
-                incr time;
-                finishingTimes := Map.add n1.nodeId !time !finishingTimes;
-                ()
-            if not ((!grey).Contains n.nodeId) then 
-                visit(n);
-                forest := (n.nodeId,!treeEdges) :: !forest);
-
-        !forest, !backEdges,  (fun n -> (!discoveryTimes).[n]), (fun n -> (!finishingTimes).[n])
- 
-
-    // Present strongly connected components, in dependency order 
-    // Each node is assumed to have a self-edge 
-    member g.GetTopologicalSortStronglyConnectedComponents() = 
-        let forest, backEdges, discoveryTimes, finishingTimes = g.DepthFirstSearch()
-        let nodeIds = List.map (fun n -> n.nodeId) nodes
-        let nodesInDecreasingFinishingOrder = 
-          List.sortWith (fun n1 n2 -> -(compare (finishingTimes n1) (finishingTimes n2))) nodeIds
-        let gT = Graph (nodeIdentity, List.map g.GetNodeData nodesInDecreasingFinishingOrder, List.map (fun (x,y) -> (g.GetNodeData y, g.GetNodeData x)) edges)
-        let forest, backEdges, discoveryTimes, finishingTimes = gT.DepthFirstSearch()
-        let scc (root,tree) = Set.add root (List.foldBack (fun (n1,n2) acc -> Set.add n1 (Set.add n2 acc)) tree Set.empty)
-        let sccs = List.rev (List.map scc forest)
-        List.map (Set.toList >> List.map g.GetNodeData) sccs
-#endif
-
-
 //---------------------------------------------------------------------------
 // In some cases we play games where we use 'null' as a more efficient representation
 // in F#. The functions below are used to give initial values to mutable fields.

src/fsharp/vs/ServiceDeclarations.fs

@@ -107,35 +107,6 @@ module internal ItemDescriptionsImpl =
 
     // Format the supertypes and other useful information about a type to a buffer
     let OutputUsefulTypeInfo _isDeclInfo (_infoReader:InfoReader) _m _denv _os _ty = ()
-#if DISABLED
-        if false then 
-          ErrorScope.ProtectAndDiscard m (fun () -> 
-            let g = infoReader.g
-            let amap = infoReader.amap
-            let supertypes = 
-                let supertypes = AllSuperTypesOfType g amap m AllowMultiIntfInstantiations.Yes ty
-                let supertypes = supertypes |> List.filter (AccessibilityLogic.IsTypeAccessible g AccessibleFromSomewhere) 
-                let supertypes = supertypes |> List.filter (typeEquiv g g.obj_ty >> not) 
-                let selfs,supertypes = supertypes |> List.partition (typeEquiv g ty) 
-                let supertypesC,supertypesI = supertypes |> List.partition (isInterfaceTy g)
-                let supertypes = selfs @ supertypesC @ supertypesI
-                supertypes
-            let supertypeLs,_ = NicePrint.layoutPrettifiedTypes denv supertypes 
-            // Suppress printing supertypes for enums, delegates, exceptions and attributes
-            if supertypes.Length > 1 // more then self
-                && not (isEnumTy g ty) 
-                && not (isUnionTy g ty) 
-                && not (isRecdTy g ty) 
-                && not (isDelegateTy g ty) 
-                && not (ExistsHeadTypeInEntireHierarchy g amap m ty g.exn_tcr) 
-                && not (ExistsHeadTypeInEntireHierarchy g amap m ty g.tcref_System_Attribute) then 
-                bprintf os "\n\n";
-                List.zip supertypes supertypeLs |> List.iter (fun (superty,supertyL) -> 
-                    if typeEquiv g superty ty then bprintf os "  %s: %a\n" (FSComp.SR.typeInfoType()) bufferL supertyL
-                    elif isClassTy g superty || isInterfaceTy g ty then bprintf os "  %s: %a\n" (FSComp.SR.typeInfoInherits()) bufferL supertyL
-                    else bprintf os "  %s: %a\n" (FSComp.SR.typeInfoImplements()) bufferL supertyL))
-#endif
-           
 
     let rangeOfPropInfo (pinfo:PropInfo) =
         match pinfo with

src/utils/sformat.fs

@@ -1159,31 +1159,6 @@ namespace Microsoft.FSharp.Text.StructuredFormat
         // pprinter: leafFormatter
         // --------------------------------------------------------------------
 
-#if Suggestion4299
-        // See bug 4299. Suppress FSI_dddd+<etc> from fsi printer.
-        let fixupForInteractiveFSharpClassesWithNoToString obj (text:string) =
-              // Given obj:T.
-              // If T is a nested type inside a parent type called FSI_dddd, then it looks like an F# Interactive type.
-              // Further, if the .ToString() text starts with "FSI_dddd+T" then it looks like it's the default ToString.
-              // A better test: it is default ToString if the MethodInfo.DeclaringType is System.Object.
-              // In this case, replace "FSI_dddd+T" by "T".
-              // assert(obj <> null)
-              let fullName = obj.GetType().FullName // e.g. "FSI_0123+Name"
-              let name     = obj.GetType().Name     // e.g. "Name"
-              let T = obj.GetType()      
-              if text.StartsWith(fullName) then
-                  // text could be a default .ToString() since it starts with the FullName of the type. More checks...
-                  if T.IsNested &&
-                     T.DeclaringType.Name.StartsWith("FSI_") &&                             // Name has "FSI_" which is 
-                     T.DeclaringType.Name.Substring(4) |> Seq.forall System.Char.IsDigit    // followed by digits?
-                  then
-                      name ^ text.Substring(fullName.Length)    // replace fullName by name at start of text
-                  else
-                      text
-              else
-                text
-#endif
-
         let leafFormatter (opts:FormatOptions) (obj :obj) =
             match obj with 
             | null -> "null"
@@ -1219,10 +1194,6 @@ namespace Microsoft.FSharp.Text.StructuredFormat
             | :? bool   as b -> (if b then "true" else "false")
             | :? char   as c -> "\'" + formatChar true c + "\'"
             | _ -> try  let text = obj.ToString()
-//Suggestion4299. Not yet fixed.
-//#if COMPILER
-//                      let text = fixupForInteractiveFSharpClassesWithNoToString obj text
-//#endif  
                         text
                    with e ->
                      // If a .ToString() call throws an exception, catch it and use the message as the result.

vsintegration/src/Salsa/VsMocks.fs

@@ -1222,39 +1222,6 @@ module internal VsMocks =
             member this.UnadviseFileChange(vscookie) = nothing()
         }
 
-#if NOT_YET_NEEDED
-    let vsExtensibility3 =
-        { new IVsExtensibility3 with
-            member this.GetProperties(pParent, pdispPropObj, ppProperties) = err(__LINE__)
-            member this.RunWizardFile(bstrWizFilename,  hwndOwner,  vContextParams,  pResult) = err(__LINE__)
-            member this.EnterAutomationFunction() = err(__LINE__)
-            member this.ExitAutomationFunction() = err(__LINE__)
-            member this.IsInAutomationFunction(pfInAutoFunc) = err(__LINE__)
-            member this.GetUserControl( fUserControl) = err(__LINE__)
-            member this.SetUserControl( fUserControl) = err(__LINE__)
-            member this.SetUserControlUnlatched( fUserControl) = err(__LINE__)
-            member this.LockServer( vb) = err(__LINE__)
-            member this.GetLockCount( pCount) = err(__LINE__)
-            member this.TestForShutdown( fShutdown) = err(__LINE__)
-            member this.GetGlobalsObject( extractFrom,  ppGlobals) = err(__LINE__)
-            member this.GetConfigMgr( pIVsProject,  itemid,  ppCfgMgr) = err(__LINE__)
-            member this.FireMacroReset() = err(__LINE__)
-            member this.GetDocumentFromDocCookie( lDocCookie,  ppDoc) = err(__LINE__)
-            member this.IsMethodDisabled( pGUID,  dispid) = err(__LINE__)
-            member this. SetSuppressUI( In) = err(__LINE__)
-            member this.GetSuppressUI( pOut) = err(__LINE__)
-            member this.FireProjectsEvent_ItemAdded( project) = err(__LINE__)
-            member this.FireProjectsEvent_ItemRemoved( project) = err(__LINE__)
-            member this.FireProjectsEvent_ItemRenamed( project,  oldName) = err(__LINE__)
-            member this.FireProjectItemsEvent_ItemAdded( projectItem) = err(__LINE__)
-            member this.FireProjectItemsEvent_ItemRemoved( projectItem) = err(__LINE__)
-            member this.FireProjectItemsEvent_ItemRenamed( projectItem,  oldName) = err(__LINE__)
-            member this.IsFireCodeModelEventNeeded( vbNeeded) = err(__LINE__)
-            member this.RunWizardFileEx( bstrWizFilename,  hwndOwner,  vContextParams,  vCustomParams,  pResult) = err(__LINE__)
-            member this.FireCodeModelEvent3( dispid,  pParent,  pElement,  changeKind) = err(__LINE__)
-        }
-#endif
-
     let vsSolution =
         { new IVsSolution with
             member x.GetProjectEnum(grfEnumFlags, rguidEnumOnlyThisType, ppenum) = err(__LINE__)
@@ -1566,9 +1533,6 @@ module internal VsMocks =
         sp.AddService(typeof<SVsTaskList>, box(vsTaskList()), false) 
         sp.AddService(typeof<SVsShellMonitorSelection>, box vsMonitorSelection, false) 
         sp.AddService(typeof<SVsFileChangeEx>, box vsFileChangeManager, false)
-#if NOT_YET_NEEDED
-        sp.AddService(typeof<EnvDTE.IVsExtensibility>, box vsExtensibility3, false)
-#endif        
         sp.AddService(typeof<SVsSolution>, box vsSolution, false)
         sp.AddService(typeof<SVsSolutionBuildManager>, box vsSolutionBuildManager, false)
         sp.AddService(typeof<SVsRunningDocumentTable>, box vsRunningDocumentTable, false)