[regexp] Remove remainder of native RegExpExecStub

src/regexp/mips/regexp-macro-assembler-mips.h

Index: src/regexp/mips/regexp-macro-assembler-mips.h
diff --git a/src/regexp/mips/regexp-macro-assembler-mips.h b/src/regexp/mips/regexp-macro-assembler-mips.h
index 6dedb1e74818f5fb02fda1fc494a8277e860c2c8..6c1ba64c5129eb7b4da6f92e316f53bafbd16507 100644
--- a/src/regexp/mips/regexp-macro-assembler-mips.h
+++ b/src/regexp/mips/regexp-macro-assembler-mips.h
@@ -103,9 +103,8 @@ class RegExpMacroAssemblerMIPS: public NativeRegExpMacroAssembler {
   static const int kStoredRegisters = kFramePointer;
   // Return address (stored from link register, read into pc on return).
   static const int kReturnAddress = kStoredRegisters + 9 * kPointerSize;
-  static const int kSecondaryReturnAddress = kReturnAddress + kPointerSize;
   // Stack frame header.
-  static const int kStackFrameHeader = kReturnAddress + kPointerSize;
+  static const int kStackFrameHeader = kReturnAddress;
   // Stack parameters placed by caller.
   static const int kRegisterOutput = kStackFrameHeader + 20;
   static const int kNumOutputRegisters = kRegisterOutput + kPointerSize;