Remove CheckNotRegistersEqual regexp-masm function from all architectures.

src/regexp-macro-assembler.h

 // Copyright 2008 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 110 matching lines @@
                                      uc16 to,  // Both inclusive.
                                      Label* on_in_range) = 0;
   virtual void CheckCharacterNotInRange(uc16 from,
                                         uc16 to,  // Both inclusive.
                                         Label* on_not_in_range) = 0;
 
   // The current character (modulus the kTableSize) is looked up in the byte
   // array, and if the found byte is non-zero, we jump to the on_bit_set label.
   virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set) = 0;
 
-  virtual void CheckNotRegistersEqual(int reg1,
-                                      int reg2,
-                                      Label* on_not_equal) = 0;
-
   // Checks whether the given offset from the current position is before
   // the end of the string.  May overwrite the current character.
   virtual void CheckPosition(int cp_offset, Label* on_outside_input) {
     LoadCurrentCharacter(cp_offset, on_outside_input, true);
   }
   // Check whether a standard/default character class matches the current
   // character. Returns false if the type of special character class does
   // not have custom support.
   // May clobber the current loaded character.
   virtual bool CheckSpecialCharacterClass(uc16 type,
@@ skipping 105 matching lines @@
                         const byte* input_end,
                         int* output,
                         Isolate* isolate);
 };
 
 #endif  // V8_INTERPRETED_REGEXP
 
 } }  // namespace v8::internal
 
 #endif  // V8_REGEXP_MACRO_ASSEMBLER_H_