[Interpreter] Remove register file register and replace with LoadParentFramePointer.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 325a33acbfc128231d354d1ef93d8de2c194dbf3..947110d65651b11d739b43377ead485c7873a847 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -19,7 +19,6 @@ const Register kReturnRegister2 = {Register::kCode_a0};
 const Register kJSFunctionRegister = {Register::kCode_a1};
 const Register kContextRegister = {Register::kCpRegister};
 const Register kInterpreterAccumulatorRegister = {Register::kCode_v0};
-const Register kInterpreterRegisterFileRegister = {Register::kCode_t3};
 const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_t4};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_t5};
 const Register kInterpreterDispatchTableRegister = {Register::kCode_t6};