Drop broken and unnecessary RequiredInputRepresentation() in HMathFloorOfDiv.

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3823 matching lines @@
  public:
   static HMathFloorOfDiv* New(Zone* zone,
                               HValue* context,
                               HValue* left,
                               HValue* right) {
     return new(zone) HMathFloorOfDiv(context, left, right);
   }
 
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
-  virtual Representation RequiredInputRepresentation(int index) {
-    return Representation::Integer32();
-  }
-
   DECLARE_CONCRETE_INSTRUCTION(MathFloorOfDiv)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
  private:
   HMathFloorOfDiv(HValue* context, HValue* left, HValue* right)
       : HBinaryOperation(context, left, right) {
     set_representation(Representation::Integer32());
     SetFlag(kUseGVN);
@@ skipping 2929 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_