How to remove Microsoft Async Targeting Pack after upgrading .NET 4.5

Question

I've installed Async Targeting Pack to be able to use its benefits with .NET 4.0 and now I upgraded the project to .NET 4.5 and I don't need it anymore.

Case 1: If I keep it the project gets about 7-8 warnings saying " The predefined type System.Runtime.CompilerServices.xxx is defined in multiple assemblies in the global alias..."

Case 2: If I remove the Microsoft.CompilerServices.AsyncTargetingPack.1.0.0 folder from [Project]\\Packages path I get more than a hundred warnings all about the contents of Microsoft.Commons.targets which is located at Windows\\Microsoft.NET\\4.0.xxx

How can I get rid of it without getting any warning?

Answer 1

So I've deleted it via NuGet for the unit test project too in the same solution and it solved it. The unit testing project was the one making the problem.