diff --git a/setup/Swix/Microsoft.FSharp.Compiler.MSBuild/Microsoft.FSharp.Compiler.MSBuild.csproj b/setup/Swix/Microsoft.FSharp.Compiler.MSBuild/Microsoft.FSharp.Compiler.MSBuild.csproj
index f38e6d7e8e..74ad3c63bd 100644
--- a/setup/Swix/Microsoft.FSharp.Compiler.MSBuild/Microsoft.FSharp.Compiler.MSBuild.csproj
+++ b/setup/Swix/Microsoft.FSharp.Compiler.MSBuild/Microsoft.FSharp.Compiler.MSBuild.csproj
@@ -99,8 +99,6 @@ folder "InstallDir:Common7\IDE\CommonExtensions\Microsoft\FSharp"
   file source="$(BinariesFolder)\FSharp.Compiler.Private\$(Configuration)\$(TargetFramework)\System.Threading.Tasks.Dataflow.dll"
   file source="$(BinariesFolder)\FSharp.Compiler.Server.Shared\$(Configuration)\$(TargetFramework)\FSharp.Compiler.Server.Shared.dll" vs.file.ngen=yes vs.file.ngenArchitecture=All vs.file.ngenPriority=2
   file source="$(BinariesFolder)\FSharp.Core\$(Configuration)\netstandard2.0\FSharp.Core.dll" vs.file.ngen=yes vs.file.ngenArchitecture=All vs.file.ngenPriority=2
-  file source="$(BinariesFolder)\FSharp.Core\$(Configuration)\netstandard2.0\FSharp.Core.optdata"
-  file source="$(BinariesFolder)\FSharp.Core\$(Configuration)\netstandard2.0\FSharp.Core.sigdata"
   file source="$(BinariesFolder)\FSharp.Build\$(Configuration)\$(TargetFramework)\FSharp.Build.dll" vs.file.ngen=yes vs.file.ngenArchitecture=All vs.file.ngenPriority=2
   file source="$(BinariesFolder)\Microsoft.DotNet.DependencyManager\$(Configuration)\net472\Microsoft.DotNet.DependencyManager.dll" vs.file.ngen=yes vs.file.ngenArchitecture=All vs.file.ngenPriority=2
   file source="$(BinariesFolder)\FSharp.Build\$(Configuration)\$(TargetFramework)\Microsoft.Build.Framework.dll"
diff --git a/src/fsharp/FSharp.Core/FSharp.Core.fsproj b/src/fsharp/FSharp.Core/FSharp.Core.fsproj
index 1a0a96f85d..c8dacc4141 100644
--- a/src/fsharp/FSharp.Core/FSharp.Core.fsproj
+++ b/src/fsharp/FSharp.Core/FSharp.Core.fsproj
@@ -225,17 +225,4 @@
     <PackageReference Include="System.Threading.Tasks.Parallel" Version="$(SystemThreadingTasksParallelVersion)" />
   </ItemGroup>
 
-  <!-- Hook compilation phase to do custom work -->
-  <!-- NOTE: The optdata and sigdata files are no longer needed by the F# compiler (the information is -->
-  <!-- integrated as resources into more recent FSharp.Core.dll's. However they are still produced to -->
-  <!-- allow older versions of the F# compiler to reference more recent FSharp.Core packages -->
-  <Target Name="CopyToBuiltBin" BeforeTargets="AfterCompile" AfterTargets="CoreCompile" >
-    <ItemGroup>
-      <BuiltProjectOutputGroupKeyOutput Include="$(IntermediateOutputPath)\FSharp.Core.sigdata" />
-      <BuiltProjectOutputGroupKeyOutput Include="$(IntermediateOutputPath)\FSharp.Core.optdata" />
-    </ItemGroup>
-    <Copy SourceFiles="$(IntermediateOutputPath)\FSharp.Core.sigdata" DestinationFolder="$(OutputPath)" SkipUnchangedFiles="true" />
-    <Copy SourceFiles="$(IntermediateOutputPath)\FSharp.Core.optdata" DestinationFolder="$(OutputPath)" SkipUnchangedFiles="true" />
-  </Target>
-
 </Project>
diff --git a/src/fsharp/FSharp.Core/FSharp.Core.nuspec b/src/fsharp/FSharp.Core/FSharp.Core.nuspec
index 0a11203fc6..dae2735f73 100644
--- a/src/fsharp/FSharp.Core/FSharp.Core.nuspec
+++ b/src/fsharp/FSharp.Core/FSharp.Core.nuspec
@@ -11,8 +11,6 @@
         $CommonFileElements$
 
         <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.dll"              target="lib\netstandard2.0" />
-        <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.sigdata"          target="lib\netstandard2.0" />
-        <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.optdata"          target="lib\netstandard2.0" />
         <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.xml"              target="lib\netstandard2.0" />
 
         <!-- resources -->
diff --git a/vsintegration/update-vsintegration.cmd b/vsintegration/update-vsintegration.cmd
index 3e2564d30a..c4a4471e10 100644
--- a/vsintegration/update-vsintegration.cmd
+++ b/vsintegration/update-vsintegration.cmd
@@ -245,8 +245,6 @@ set RESTOREDIR=!RESTOREBASE!\main_assemblies
 CALL :checkAvailability main_assemblies
 if "!BIN_AVAILABLE!" == "true" (
     CALL :backupAndOrCopy FSharp.Core.dll "%COMPILERMAINASSEMBLIESPATH%"
-    CALL :backupAndOrCopy FSharp.Core.optdata "%COMPILERMAINASSEMBLIESPATH%"
-    CALL :backupAndOrCopy FSharp.Core.sigdata "%COMPILERMAINASSEMBLIESPATH%"
     CALL :backupAndOrCopy FSharp.Core.xml "%COMPILERMAINASSEMBLIESPATH%"
 )