Remove CopyToOutputDirectory=Always.

This was causing some unecessary rebuilds inside Visual Studio. (changeset 1367226)

Src/Tools/Source/OpenSourceDebug/OpenSourceDebug.csproj

@@ -64,7 +64,6 @@
   </ItemGroup>
   <ItemGroup>
     <Content Include="enableopensource.pkgdef">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       <IncludeInVSIX>true</IncludeInVSIX>
     </Content>
     <Content Include="License.txt">