[crankshaft] Delete unused Hydrogen-BCH code

src/crankshaft/hydrogen.h

 // Copyright 2012 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_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast.h"
@@ skipping 276 matching lines @@
  private:
   void AddBlock(HBasicBlock* block);
 
   ZoneList<HBasicBlock*> back_edges_;
   HBasicBlock* loop_header_;
   ZoneList<HBasicBlock*> blocks_;
   HStackCheck* stack_check_;
 };
 
 
-class BoundsCheckTable;
-class InductionVariableBlocksTable;
 class HGraph final : public ZoneObject {
  public:
   explicit HGraph(CompilationInfo* info, CallInterfaceDescriptor descriptor);
 
   Isolate* isolate() const { return isolate_; }
   Zone* zone() const { return zone_; }
   CompilationInfo* info() const { return info_; }
   CallInterfaceDescriptor descriptor() const { return descriptor_; }
 
   const ZoneList<HBasicBlock*>* blocks() const { return &blocks_; }
@@ skipping 2752 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_