Don't copy the entirety of libgit2.

Author: joshaber

ObjectiveGitFramework.xcodeproj/project.pbxproj

@@ -422,7 +422,6 @@
 		4D79C0EC17DF9F4D00997DE4 /* GTCredential.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = GTCredential.h; sourceTree = "<group>"; };
 		4D79C0ED17DF9F4D00997DE4 /* GTCredential.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GTCredential.m; sourceTree = "<group>"; };
 		4D79C0F617DFAA7100997DE4 /* GTCredential+Private.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "GTCredential+Private.h"; sourceTree = "<group>"; };
-		4D8DADBE181A7D9F001B1202 /* libgit2 */ = {isa = PBXFileReference; lastKnownFileType = folder; name = libgit2; path = External/libgit2; sourceTree = "<group>"; };
 		4DBA4A3117DA73CE006CD5F5 /* GTRemoteSpec.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GTRemoteSpec.m; sourceTree = "<group>"; };
 		4DE864341794A37E00371A65 /* GTRepository+Private.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "GTRepository+Private.h"; sourceTree = "<group>"; };
 		4DFFB159183AA8D600D1565E /* GTRepository+RemoteOperations.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "GTRepository+RemoteOperations.h"; sourceTree = "<group>"; };
@@ -644,7 +643,6 @@
 		0867D69AFE84028FC02AAC07 /* External Frameworks and Libraries */ = {
 			isa = PBXGroup;
 			children = (
-				4D8DADBE181A7D9F001B1202 /* libgit2 */,
 				306123A817EA5261006591D4 /* extobjc */,
 				4D103ADC1819CFAA0029DB24 /* libiconv.dylib */,
 				8803DA861313145700E6E818 /* libz.dylib */,