Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/ConsoleLogger.cs

@@ -291,11 +291,7 @@ namespace Microsoft.Build.BuildEngine
 			// Hence we expect sender as a valid object only if it is IBuildEngine4 -
 			// only Microsoft.Build.Internal.BuildEngine4 implements it so far. 
 			// (Used IBuildEngine3 because it needs to build for NET_4_0).
-#if NET_4_0
 			var key = sender as IBuildEngine3 ?? dummy_key;
-#else
-			var key = dummy_key;
-#endif
 			if (!build_records.TryGetValue (key, out r)) {
 				r = new BuildRecord (this);
 				build_records.Add (key, r);