fix(windows): update VS project to support package refs (#554)

windows/ReactNativePicker/ReactNativePicker.vcxproj

@@ -164,12 +164,4 @@
     <Import Project="$(SolutionDir)\packages\Microsoft.Windows.CppWinRT.2.0.210312.4\build\native\Microsoft.Windows.CppWinRT.targets" Condition="Exists('$(SolutionDir)\packages\Microsoft.Windows.CppWinRT.2.0.210312.4\build\native\Microsoft.Windows.CppWinRT.targets')" />
     <Import Project="$(SolutionDir)\packages\$(WinUIPackageName).$(WinUIPackageVersion)\build\native\$(WinUIPackageName).targets" Condition="Exists('$(SolutionDir)\packages\$(WinUIPackageName).$(WinUIPackageVersion)\build\native\$(WinUIPackageName).targets')" />
   </ImportGroup>
-  <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('$(SolutionDir)\packages\Microsoft.Windows.CppWinRT.2.0.210312.4\build\native\Microsoft.Windows.CppWinRT.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\packages\Microsoft.Windows.CppWinRT.2.0.210312.4\build\native\Microsoft.Windows.CppWinRT.props'))" />
-    <Error Condition="!Exists('$(SolutionDir)\packages\Microsoft.Windows.CppWinRT.2.0.210312.4\build\native\Microsoft.Windows.CppWinRT.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\packages\Microsoft.Windows.CppWinRT.2.0.210312.4\build\native\Microsoft.Windows.CppWinRT.targets'))" />
-    <Error Condition="!Exists('$(SolutionDir)\packages\$(WinUIPackageName).$(WinUIPackageVersion)\build\native\$(WinUIPackageName).targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\packages\$(WinUIPackageName).$(WinUIPackageVersion)\build\native\$(WinUIPackageName).targets'))" />
-  </Target>
-</Project>
+</Project>