Revert "Add test where X is defined differentlty in co-importing libraries"

tests/language/src/LibrarySameNameUsedTest.dart

Index: tests/language/src/LibrarySameNameUsedTest.dart
diff --git a/tests/language/src/LibrarySameNameUsedTest.dart b/tests/language/src/LibrarySameNameUsedTest.dart
deleted file mode 100644
index c453a622079db5f403acdc6090968c4f7d019419..0000000000000000000000000000000000000000
--- a/tests/language/src/LibrarySameNameUsedTest.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// 'X' is defined as an interface in lib1 and a class implementing that
-// interface in lib2.  Use of #import prefixes should allow this.
-
-#library('main')
-#import("LibrarySameNameUsedLib1.dart");
-
-main() {
-  var x = makeX();
-  Expect.equals('lib2.X', '$x');
-}