[turbofan] Remove the unused asm.js types from TypeCache.

src/compiler/js-global-object-specialization.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_JS_GLOBAL_OBJECT_SPECIALIZATION_H_
 #define V8_COMPILER_JS_GLOBAL_OBJECT_SPECIALIZATION_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class CompilationDependencies;
-class TypeCache;
-
 
 namespace compiler {
 
 // Forward declarations.
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
 class SimplifiedOperatorBuilder;
-
+class TypeCache;
 
 // Specializes a given JSGraph to a given global object, potentially constant
 // folding some {JSLoadGlobal} nodes or strength reducing some {JSStoreGlobal}
 // nodes.
 class JSGlobalObjectSpecialization final : public AdvancedReducer {
  public:
   JSGlobalObjectSpecialization(Editor* editor, JSGraph* jsgraph,
                                MaybeHandle<Context> native_context,
                                CompilationDependencies* dependencies);
 
@@ skipping 26 matching lines @@
   TypeCache const& type_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(JSGlobalObjectSpecialization);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_GLOBAL_OBJECT_SPECIALIZATION_H_