Migrate block 44.

tests/language_strong/built_in_identifier_prefix_library_part.dart

Index: tests/language_strong/built_in_identifier_prefix_library_part.dart
diff --git a/tests/language_strong/built_in_identifier_prefix_library_part.dart b/tests/language_strong/built_in_identifier_prefix_library_part.dart
deleted file mode 100644
index 2193a4584ae7968602d57d964248aacdc112d80f..0000000000000000000000000000000000000000
--- a/tests/language_strong/built_in_identifier_prefix_library_part.dart
+++ /dev/null
@@ -1,11 +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.
-
-library part;
-
-class A {}
-
-class B<T> {}
-
-class C<T, S> {}