Less inequivalence on Hello World!

tests/compiler/dart2js/memory_compiler.dart

Index: tests/compiler/dart2js/memory_compiler.dart
diff --git a/tests/compiler/dart2js/memory_compiler.dart b/tests/compiler/dart2js/memory_compiler.dart
index ae3f9cb449f9475dfc6e11d03c75e1e5aae6e9df..3d758f1cd3b86340b01ae6700ff879e7028839ee 100644
--- a/tests/compiler/dart2js/memory_compiler.dart
+++ b/tests/compiler/dart2js/memory_compiler.dart
@@ -17,7 +17,6 @@ import 'package:compiler/compiler_new.dart'
 import 'package:compiler/src/diagnostics/messages.dart' show Message;
 import 'package:compiler/src/elements/entities.dart'
     show LibraryEntity, MemberEntity;
-import 'package:compiler/src/elements/resolution_types.dart' show Types;
 import 'package:compiler/src/enqueue.dart' show ResolutionEnqueuer;
 import 'package:compiler/src/null_compiler_output.dart' show NullCompilerOutput;
 import 'package:compiler/src/library_loader.dart' show LoadedLibraries;
@@ -173,8 +172,6 @@ CompilerImpl compilerFor(
           packagesDiscoveryProvider: packagesDiscoveryProvider));
 
   if (cachedCompiler != null) {
-    Types types = cachedCompiler.types;
-    compiler.types = types.copy(compiler.resolution);
     Map copiedLibraries = {};
     cachedCompiler.libraryLoader.libraries.forEach((dynamic library) {
       if (library.isPlatformLibrary) {