Removed local NuGet package that was causing build issues for KeyVault on the Stack solution.

Author: Michael

src/ResourceManager/KeyVault/Commands.KeyVault/Commands.KeyVault.csproj

@@ -238,11 +238,4 @@
      />  
     <Copy SourceFiles="@(MarkdownFiles)" DestinationFolder="$(OutputPath)\help\" ContinueOnError="false" />
   </Target>
-  <Import Project="..\..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
-  </Target>
 </Project>