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

src/compiler/simplified-lowering.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_SIMPLIFIED_LOWERING_H_
 #define V8_COMPILER_SIMPLIFIED_LOWERING_H_
 
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
-
-// Forward declarations.
-class TypeCache;
-
-
 namespace compiler {
 
 // Forward declarations.
 class RepresentationChanger;
 class RepresentationSelector;
 class SourcePositionTable;
+class TypeCache;
 
 class SimplifiedLowering final {
  public:
   SimplifiedLowering(JSGraph* jsgraph, Zone* zone,
                      SourcePositionTable* source_positions);
   ~SimplifiedLowering() {}
 
   void LowerAllNodes();
 
   void DoMax(Node* node, Operator const* op, MachineRepresentation rep);
@@ skipping 45 matching lines @@
   CommonOperatorBuilder* common() { return jsgraph()->common(); }
   MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
   SimplifiedOperatorBuilder* simplified() { return jsgraph()->simplified(); }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_SIMPLIFIED_LOWERING_H_