Remove code supporting incremental compilation in dart2js

tests/compiler/dart2js/kernel/closed_world_test.dart

 // Copyright (c) 2016, 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.
 
 // Tests that the closed world computed from [WorldImpact]s derived from kernel
 // is equivalent to the original computed from resolution.
 library dart2js.kernel.closed_world_test;
 
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/commandline_options.dart';
@@ skipping 74 matching lines @@
     JavaScriptBackend backend = compiler.backend;
     // Create a new resolution enqueuer and feed it with the [WorldImpact]s
     // computed from kernel through the [build] in `kernel_impact.dart`.
     ResolutionEnqueuer enqueuer = new ResolutionEnqueuer(
         compiler.enqueuer,
         compiler.options,
         compiler.resolution,
         const TreeShakingEnqueuerStrategy(),
         compiler.globalDependencies,
         backend,
-        compiler.cacheStrategy,
         'enqueuer from kernel');
     // TODO(johnniwinther): Store backend info separately. This replacement is
     // made to reset a field in [TypeVariableHandler] that prevents it from
     // enqueuing twice.
     backend.typeVariableHandler = new TypeVariableHandler(compiler);
 
     if (compiler.deferredLoadTask.isProgramSplit) {
       enqueuer.applyImpact(backend.computeDeferredLoadingImpact());
     }
     enqueuer.applyImpact(backend.computeHelpersImpact());
@@ skipping 28 matching lines @@
         // The class cannot itself be instantiated.
         return false;
       }
       return true;
     }, verbose: arguments.verbose);
     checkClosedWorlds(
         compiler.resolutionWorldBuilder.closedWorldForTesting, closedWorld,
         verbose: arguments.verbose);
   });
 }