[Interpreter] Remove unnecessary const specifiers on scalar types.

src/interpreter/bytecodes.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_INTERPRETER_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 48 matching lines @@
   // Returns string representation of |bytecode|.
   static const char* ToString(Bytecode bytecode);
 
   // Returns byte value of bytecode.
   static uint8_t ToByte(Bytecode bytecode);
 
   // Returns bytecode for |value|.
   static Bytecode FromByte(uint8_t value);
 
   // Returns the number of operands expected by |bytecode|.
-  static const int NumberOfOperands(Bytecode bytecode);
+  static int NumberOfOperands(Bytecode bytecode);
 
   // Return the i-th operand of |bytecode|.
-  static const OperandType GetOperandType(Bytecode bytecode, int i);
+  static OperandType GetOperandType(Bytecode bytecode, int i);
 
   // Returns the size of the bytecode including its arguments.
-  static const int Size(Bytecode bytecode);
+  static int Size(Bytecode bytecode);
 
   // The maximum number of operands across all bytecodes.
-  static const int MaximumNumberOfOperands();
+  static int MaximumNumberOfOperands();
 
   // Maximum size of a bytecode and its arguments.
-  static const int MaximumSize();
+  static int MaximumSize();
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes);
 };
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_