s390: cleanup old instruction decode routines

src/s390/simulator-s390.h

Index: src/s390/simulator-s390.h
diff --git a/src/s390/simulator-s390.h b/src/s390/simulator-s390.h
index 62bc6dfcae62f558f60c81176f46cd8d72c2252d..03efa1272ee775dc350bddd16eb8df7e31a91056 100644
--- a/src/s390/simulator-s390.h
+++ b/src/s390/simulator-s390.h
@@ -309,18 +309,6 @@ class Simulator {
 
   // S390
   void Trace(Instruction* instr);
-  bool DecodeTwoByte(Instruction* instr);
-  bool DecodeFourByte(Instruction* instr);
-  bool DecodeFourByteArithmetic(Instruction* instr);
-  bool DecodeFourByteArithmetic64Bit(Instruction* instr);
-  bool DecodeFourByteFloatingPoint(Instruction* instr);
-  void DecodeFourByteFloatingPointIntConversion(Instruction* instr);
-  void DecodeFourByteFloatingPointRound(Instruction* instr);
-
-  bool DecodeSixByte(Instruction* instr);
-  bool DecodeSixByteArithmetic(Instruction* instr);
-  bool S390InstructionDecode(Instruction* instr);
-  void DecodeSixByteBitShift(Instruction* instr);
 
   // Used by the CL**BR instructions.
   template <typename T1, typename T2>