Remove CheckNotRegistersEqual regexp-masm function from all architectures.

src/ia32/regexp-macro-assembler-ia32.cc

 // Copyright 2011 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 464 matching lines @@
   // Move current character position to position after match.
   __ mov(edi, ecx);
   __ sub(edi, esi);
   // Restore backtrack stackpointer.
   __ pop(backtrack_stackpointer());
 
   __ bind(&fallthrough);
 }
 
 
-void RegExpMacroAssemblerIA32::CheckNotRegistersEqual(int reg1,
-                                                      int reg2,
-                                                      Label* on_not_equal) {
-  __ mov(eax, register_location(reg1));
-  __ cmp(eax, register_location(reg2));
-  BranchOrBacktrack(not_equal, on_not_equal);
-}
-
-
 void RegExpMacroAssemblerIA32::CheckNotCharacter(uint32_t c,
                                                  Label* on_not_equal) {
   __ cmp(current_character(), c);
   BranchOrBacktrack(not_equal, on_not_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckCharacterAfterAnd(uint32_t c,
                                                       uint32_t mask,
                                                       Label* on_equal) {
@@ skipping 824 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32