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

tests/language/src/LibrarySameNameUsedLib1.dart

Index: tests/language/src/LibrarySameNameUsedLib1.dart
diff --git a/tests/language/src/LibrarySameNameUsedLib1.dart b/tests/language/src/LibrarySameNameUsedLib1.dart
deleted file mode 100644
index 85aaa7688ede682531c99da1848bcd0d3a662a16..0000000000000000000000000000000000000000
--- a/tests/language/src/LibrarySameNameUsedLib1.dart
+++ /dev/null
@@ -1,11 +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.
-
-#library('lib1');
-#import('LibrarySameNameUsedLib2.dart', prefix:'lib2');
-
-interface X {
-}
-
-X makeX() { return new lib2.X(); }