Enable MSBuild EndToEnd test on all platforms.

test/EndToEnd/GivenDotNetUsesMSBuild.cs

@@ -1,7 +1,6 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-using System.Runtime.InteropServices;
 using Microsoft.DotNet.Tools.Test.Utilities;
 using Xunit;
 
@@ -11,10 +10,6 @@ namespace Microsoft.DotNet.Tests.EndToEnd
     {
         [Fact]
         public void ItCanNewRestoreBuildRunMSBuildProject()
-        {
-            // The current ResolveNuGetAssets target does not work on case-sensitive file systems.  We need https://github.com/dotnet/sdk/pull/10
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ||
-                RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
         {
             using (DisposableDirectory directory = Temp.CreateDirectory())
             {
@@ -48,5 +43,4 @@ namespace Microsoft.DotNet.Tests.EndToEnd
             }
         }
     }
-    }
 }