s390: remove redundant instr in loadrepresentation

src/s390/macro-assembler-s390.cc

Index: src/s390/macro-assembler-s390.cc
diff --git a/src/s390/macro-assembler-s390.cc b/src/s390/macro-assembler-s390.cc
index bd44ab708eeb98adb6344908af8ca0c746a892e1..8cf345f658f21202f36f8edfb0c32927b84f51f8 100644
--- a/src/s390/macro-assembler-s390.cc
+++ b/src/s390/macro-assembler-s390.cc
@@ -3132,12 +3132,10 @@ void MacroAssembler::LoadRepresentation(Register dst, const MemOperand& mem,
   DCHECK(!r.IsDouble());
   if (r.IsInteger8()) {
     LoadB(dst, mem);
-    lgbr(dst, dst);
   } else if (r.IsUInteger8()) {
     LoadlB(dst, mem);
   } else if (r.IsInteger16()) {
     LoadHalfWordP(dst, mem, scratch);
-    lghr(dst, dst);
   } else if (r.IsUInteger16()) {
     LoadHalfWordP(dst, mem, scratch);
 #if V8_TARGET_ARCH_S390X