Remove HRuntimeType implementation

pkg/compiler/lib/src/js_emitter/code_emitter_task.dart

 // 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 dart2js.js_emitter.code_emitter_task;
 
 import 'package:js_runtime/shared/embedded_names.dart' show JsBuiltin;
 
 import '../common.dart';
 import '../common/tasks.dart' show CompilerTask;
@@ skipping 22 matching lines @@
  * The code for the containing (used) methods must exist in the `universe`.
  */
 class CodeEmitterTask extends CompilerTask {
   TypeTestRegistry typeTestRegistry;
   NativeEmitter nativeEmitter;
   MetadataCollector metadataCollector;
   EmitterFactory _emitterFactory;
   Emitter _emitter;
   final Compiler compiler;
 
-  /// Records if a type variable is read dynamically for type tests.
-  final Set<TypeVariableEntity> readTypeVariables =
-      new Set<TypeVariableEntity>();
-
   JavaScriptBackend get backend => compiler.backend;
 
   @deprecated
   // This field should be removed. It's currently only needed for dump-info and
   // tests.
   // The field is set after the program has been emitted.
   /// Contains a list of all classes that are emitted.
   Set<ClassEntity> neededClasses;
 
   CodeEmitterTask(
@@ skipping 87 matching lines @@
   /// The given type [e] might be a Typedef.
   jsAst.Expression typeAccess(Entity e) {
     return emitter.typeAccess(e);
   }
 
   /// Returns the JS template for the given [builtin].
   jsAst.Template builtinTemplateFor(JsBuiltin builtin) {
     return emitter.templateForBuiltin(builtin);
   }
 
-  void registerReadTypeVariable(TypeVariableEntity element) {
-    readTypeVariables.add(element);
-  }
-
   Set<ClassEntity> _finalizeRti() {
     // Compute the required type checks to know which classes need a
     // 'is$' method.
     typeTestRegistry.computeRequiredTypeChecks();
     // Compute the classes needed by RTI.
     return typeTestRegistry.computeRtiNeededClasses();
   }
 
   /// Creates the [Emitter] for this task.
   void createEmitter(Namer namer, ClosedWorld closedWorld) {
@@ skipping 74 matching lines @@
 
   /// Returns the JS code for accessing the given [constant].
   jsAst.Expression constantReference(ConstantValue constant);
 
   /// Returns the JS template for the given [builtin].
   jsAst.Template templateForBuiltin(JsBuiltin builtin);
 
   /// Returns the size of the code generated for a given output [unit].
   int generatedSize(OutputUnit unit);
 }