Revert "Removed unnneded import."

This reverts commit 3720d5d.

Author: grokys

src/GitHub.VisualStudio/GitHub.VisualStudio.csproj

@@ -418,6 +418,7 @@
     <UseCodebase>true</UseCodebase>
   </PropertyGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <Import Project="$(VSToolsPath)\VSSDK\Microsoft.VsSDK.targets" Condition="'$(VSToolsPath)' != '' And '$(NCrunch)' != '1'" />
   <Import Project="packaging.targets" />
   <!-- For regenerating templates on build -->
   <Import Project="..\common\t4.targets" />