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

src/compiler/access-info.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_ACCESS_INFO_H_
 #define V8_COMPILER_ACCESS_INFO_H_
 
 #include <iosfwd>
 
 #include "src/field-index.h"
 #include "src/objects.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class CompilationDependencies;
 class Factory;
-class TypeCache;
 
 namespace compiler {
 
+// Forward declarations.
+class TypeCache;
+
 // Whether we are loading a property or storing to a property.
 enum class AccessMode { kLoad, kStore };
 
 std::ostream& operator<<(std::ostream&, AccessMode);
 
 typedef std::vector<Handle<Map>> MapList;
 
 // Mapping of transition source to transition target.
 typedef std::vector<std::pair<Handle<Map>, Handle<Map>>> MapTransitionList;
 
@@ skipping 115 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(AccessInfoFactory);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ACCESS_INFO_H_