Remove unnecessary SourceLink PackageReferences (#174)

* Microsoft.SourceLink is automatically included with .NET 8+ SDKs

Author: PaulusParssinen

src/Bedrock.Framework.Experimental/Bedrock.Framework.Experimental.csproj

@@ -31,7 +31,6 @@
   </Choose>
 
   <ItemGroup>
-    <PackageReference Update="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageReference Update="Nerdbank.GitVersioning" Version="3.6.146" />
   </ItemGroup>
 

src/Bedrock.Framework/Bedrock.Framework.csproj

@@ -25,7 +25,6 @@
   </Choose>
 
   <ItemGroup>
-    <PackageReference Update="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageReference Update="Nerdbank.GitVersioning" Version="3.6.146" />
   </ItemGroup>
 </Project>