test rename overhaul: step 8 - language tests

tests/language/src/StringEscape3NegativeTestHelper.dart

Index: tests/language/src/StringEscape3NegativeTestHelper.dart
diff --git a/tests/language/src/StringEscape3NegativeTestHelper.dart b/tests/language/src/StringEscape3NegativeTestHelper.dart
deleted file mode 100644
index 6b7461cc6bf080ca3fa32f39ce99e7ec54ae7a2e..0000000000000000000000000000000000000000
--- a/tests/language/src/StringEscape3NegativeTestHelper.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2012, 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.
-
-// An empty library, imported by StringEscape3NegativeTest.dart.
-
-#library('empty');