Remove dart2jslib.dart

tests/compiler/dart2js/deferred_emit_type_checks_test.dart

 // Copyright (c) 2014, 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.
 
 // Test that the additional runtime type support is output to the right
 // Files when using deferred loading.
 
 import 'package:async_helper/async_helper.dart';
-import 'package:compiler/src/dart2jslib.dart';
+import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/js_backend/js_backend.dart'
        show JavaScriptBackend;
 import 'package:expect/expect.dart';
 import 'memory_compiler.dart';
 import 'output_collector.dart';
 
 void main() {
   asyncTest(() async {
     OutputCollector collector = new OutputCollector();
     CompilationResult result = await runCompiler(
@@ skipping 26 matching lines @@
 class A<T> {}
 
 class B<T> implements A<T> {}
 
 B<B> instance = new B<B>();
 
 bool f (Object o) {
   return o is A<A>;
 }
 """,};