Remove CheckNotRegistersEqual regexp-masm function from all architectures.

src/regexp-macro-assembler-irregexp.cc

 // Copyright 2008-2009 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 389 matching lines @@
 void RegExpMacroAssemblerIrregexp::CheckNotBackReferenceIgnoreCase(
     int start_reg,
     Label* on_not_equal) {
   ASSERT(start_reg >= 0);
   ASSERT(start_reg <= kMaxRegister);
   Emit(BC_CHECK_NOT_BACK_REF_NO_CASE, start_reg);
   EmitOrLink(on_not_equal);
 }
 
 
-void RegExpMacroAssemblerIrregexp::CheckNotRegistersEqual(int reg1,
-                                                          int reg2,
-                                                          Label* on_not_equal) {
-  ASSERT(reg1 >= 0);
-  ASSERT(reg1 <= kMaxRegister);
-  Emit(BC_CHECK_NOT_REGS_EQUAL, reg1);
-  Emit32(reg2);
-  EmitOrLink(on_not_equal);
-}
-
-
 void RegExpMacroAssemblerIrregexp::CheckCharacters(
   Vector<const uc16> str,
   int cp_offset,
   Label* on_failure,
   bool check_end_of_string) {
   ASSERT(cp_offset >= kMinCPOffset);
   ASSERT(cp_offset + str.length() - 1 <= kMaxCPOffset);
   // It is vital that this loop is backwards due to the unchecked character
   // load below.
   for (int i = str.length() - 1; i >= 0; i--) {
@@ skipping 67 matching lines @@
   own_buffer_ = true;
   memcpy(buffer_.start(), old_buffer.start(), old_buffer.length());
   if (old_buffer_was_our_own) {
     old_buffer.Dispose();
   }
 }
 
 #endif  // V8_INTERPRETED_REGEXP
 
 } }  // namespace v8::internal