Don't ship the FSharp.Core XmlDocs as Content in the nuget package. (dotnet#13838)

Fixes dotnet#12706.

Co-authored-by: Vlad Zarytovskii <[email protected]>
Co-authored-by: Kevin Ransom (msft) <[email protected]>

Author: 3 people

src/FSharp.Core/FSharp.Core.nuspec

@@ -7,23 +7,18 @@
             <group targetFramework=".NETStandard2.0" />
             <group targetFramework=".NETStandard2.1" />
         </dependencies>
-        <contentFiles> <!-- Deploy doc comments as Content -->
-            <files include="**/FSharp.Core.xml" buildAction="None" copyToOutput="true" flatten="true" />
-        </contentFiles> 
     </metadata>
     <files>
         $CommonFileElements$
 
         <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.dll" target="lib\netstandard2.0" />
         <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.xml" target="lib\netstandard2.0" />
-        <file src="FSharp.Core\$Configuration$\netstandard2.0\FSharp.Core.xml" target="contentFiles/any/netstandard2.0" />
 
         <!-- resources -->
         <file src="FSharp.Core\$Configuration$\netstandard2.0\**\FSharp.Core.resources.dll" target="lib\netstandard2.0" />
 
         <file src="FSharp.Core\$Configuration$\netstandard2.1\FSharp.Core.dll" target="lib\netstandard2.1" />
         <file src="FSharp.Core\$Configuration$\netstandard2.1\FSharp.Core.xml" target="lib\netstandard2.1" />
-        <file src="FSharp.Core\$Configuration$\netstandard2.1\FSharp.Core.xml" target="contentFiles/any/netstandard2.1" />
 
         <!-- resources -->
         <file src="FSharp.Core\$Configuration$\netstandard2.1\**\FSharp.Core.resources.dll" target="lib\netstandard2.1" />