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

src/compiler/typer.h

 // Copyright 2014 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_TYPER_H_
 #define V8_COMPILER_TYPER_H_
 
 #include "src/compiler/graph.h"
 #include "src/compiler/operation-typer.h"
-#include "src/types.h"
 
 namespace v8 {
 namespace internal {
+namespace compiler {
 
 // Forward declarations.
-class TypeCache;
-
-namespace compiler {
-
 class LoopVariableOptimizer;
-class OperationTyper;
 
 class Typer {
  public:
   Typer(Isolate* isolate, Graph* graph);
   ~Typer();
 
   void Run();
   // TODO(bmeurer,jarin): Remove this once we have a notion of "roots" on Graph.
   void Run(const ZoneVector<Node*>& roots,
            LoopVariableOptimizer* induction_vars);
@@ skipping 20 matching lines @@
   Type* truish_;
 
   DISALLOW_COPY_AND_ASSIGN(Typer);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_TYPER_H_