The LSIF experiment has been abandoned. Removing our code. (#78904)

Author: CyrusNajmabadi

Roslyn.sln

@@ -374,10 +374,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CompilersIOperationGenerator", "src\Tools\Source\CompilerGeneratorTools\Source\IOperationGenerator\CompilersIOperationGenerator.csproj", "{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator", "src\Features\Lsif\Generator\Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.csproj", "{B9899CF1-E0EB-4599-9E24-6939A04B4979}"
-EndProject
-Project("{778DAE3C-4631-46EA-AA77-85C1314464D9}") = "Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.UnitTests", "src\Features\Lsif\GeneratorTest\Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.UnitTests.vbproj", "{D15BF03E-04ED-4BEE-A72B-7620F541F4E2}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Analyzers", "Analyzers", "{4A49D526-1644-4819-AA4F-95B348D447D4}"
 EndProject
 Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "CompilerExtensions", "src\Workspaces\SharedUtilitiesAndExtensions\Compiler\Core\CompilerExtensions.shproj", "{EC946164-1E17-410B-B7D9-7DE7E6268D63}"
@@ -1295,14 +1291,6 @@ Global
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7}.Release|Any CPU.Build.0 = Release|Any CPU
-		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B9899CF1-E0EB-4599-9E24-6939A04B4979}.Release|Any CPU.Build.0 = Release|Any CPU
-		{D15BF03E-04ED-4BEE-A72B-7620F541F4E2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{D15BF03E-04ED-4BEE-A72B-7620F541F4E2}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{D15BF03E-04ED-4BEE-A72B-7620F541F4E2}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{D15BF03E-04ED-4BEE-A72B-7620F541F4E2}.Release|Any CPU.Build.0 = Release|Any CPU
 		{B64766CD-1A1F-4C1B-B11F-C30F82B8E41E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{B64766CD-1A1F-4C1B-B11F-C30F82B8E41E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B64766CD-1A1F-4C1B-B11F-C30F82B8E41E}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -1974,8 +1962,6 @@ Global
 		{CE7F7553-DB2D-4839-92E3-F042E4261B4E} = {8DBA5174-B0AA-4561-82B1-A46607697753}
 		{FF38E9C9-7A25-44F0-B2C4-24C9BFD6A8F6} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
 		{D55FB2BD-CC9E-454B-9654-94AF5D910BF7} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
-		{B9899CF1-E0EB-4599-9E24-6939A04B4979} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
-		{D15BF03E-04ED-4BEE-A72B-7620F541F4E2} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
 		{4A49D526-1644-4819-AA4F-95B348D447D4} = {3E5FE3DB-45F7-4D83-9097-8F05D3B3AEC6}
 		{EC946164-1E17-410B-B7D9-7DE7E6268D63} = {7A69EA65-4411-4CD0-B439-035E720C1BD3}
 		{99F594B1-3916-471D-A761-A6731FC50E9A} = {9C1BE25C-5926-4E56-84AE-D2242CB0627E}