Revert PackageSourceGenerator changes

Author: ellahathaway

src/packageSourceGenerator/PackageSourceGenerator.proj

@@ -79,7 +79,6 @@
                             GenerateReferencePackageSource;
                             GenerateTextOnlyPackageSource;
                             GeneratePackageProject;
-                            AddAttributes;
                             RewriteNuspec;
                             EndGeneratePackageSource;
                             InvokePackageDependencies" />
@@ -286,27 +285,6 @@
              Importance="high" />
   </Target>
 
-  <!-- Add SBRP attribute to CSharp file and copy to target directory. -->
-  <UsingTask TaskName="AddAttributes" AssemblyFile="$(PackageSourceGeneratorTaskAssembly)" />
-  <Target Name="AddAttributes"
-          Condition="'@(PackageCompileItem)' != '' or '$(PackageType)' == 'text'">
-
-    <ItemGroup>
-      <PackageCSharpFiles Include="$(PackageTargetDirectory)**/*.cs" />
-    </ItemGroup>
-
-    <ItemGroup>
-      <Attributes Include="[assembly: System.Reflection.AssemblyMetadata(&quot;source&quot;, &quot;source-build-reference-packages&quot;)]"/>
-    </ItemGroup>
-
-    <AddAttributes CSharpPaths="@(PackageCSharpFiles)"
-                   Attributes="@(Attributes)"/>
-
-    <Message Text="$(MSBuildProjectName) -> @(PackageCSharpFiles)"
-             Importance="high" />
-
-  </Target>
-
   <!-- Rewrite nuspec and copy to target directory. -->
   <UsingTask TaskName="RewriteNuspec" AssemblyFile="$(PackageSourceGeneratorTaskAssembly)" />
   <Target Name="RewriteNuspec"