Remove unneeded reference

Author: Vlad Cananau

src/ResourceManager/Dns/Commands.Dns.Test/Commands.Dns.Test.csproj

@@ -73,9 +73,6 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\..\..\packages\Microsoft.IdentityModel.Clients.ActiveDirectory.2.12.111071459\lib\net45\Microsoft.IdentityModel.Clients.ActiveDirectory.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.IdentityModel.Clients.ActiveDirectory.WindowsForms">
-      <HintPath>..\..\..\packages\Microsoft.IdentityModel.Clients.ActiveDirectory.2.12.111071459\lib\net45\Microsoft.IdentityModel.Clients.ActiveDirectory.WindowsForms.dll</HintPath>
-    </Reference>
     <Reference Include="Microsoft.Threading.Tasks, Version=1.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\..\..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>