Format-Hex: Improve mixed-collection piped input and piped streams of input (PowerShell#8674)

Author: vexx32

src/System.Management.Automation/FormatAndOutput/DefaultFormatters/PowerShellCore_format_ps1xml.cs

@@ -18,19 +18,6 @@ internal static IEnumerable<ExtendedTypeDefinition> GetFormatData()
                     .EndEntry()
                 .EndControl();
 
-            var ByteCollection_GroupHeader = CustomControl.Create()
-                    .StartEntry()
-                        .StartFrame()
-                            .AddScriptBlockExpressionBinding(@"
-                      $header = ""                       00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F""
-                      if($_.Path) { $header = ""                       "" + [Microsoft.PowerShell.Commands.UtilityResources]::FormatHexPathPrefix + $_.Path + ""`r`n`r`n"" + $header }
-
-                      $header
-                    ")
-                        .EndFrame()
-                    .EndEntry()
-                .EndControl();
-
             var sharedControls = new CustomControl[] {
                 AvailableModules_GroupingFormat
             };