MIPS32: Remove EXTRA, NORMAL instruction type check.

src/mips/simulator-mips.h

Index: src/mips/simulator-mips.h
diff --git a/src/mips/simulator-mips.h b/src/mips/simulator-mips.h
index 394d8e650a88a02e2bc2ad10fb9ca44de87aa5d0..293a9d006866442d9d3a7cfdd3e09b6092ee1c73 100644
--- a/src/mips/simulator-mips.h
+++ b/src/mips/simulator-mips.h
@@ -140,7 +140,7 @@ class SimInstruction : public InstructionGetters<SimInstructionBase> {
   SimInstruction& operator=(Instruction* instr) {
     operand_ = *reinterpret_cast<const int32_t*>(instr);
     instr_ = instr;
-    type_ = InstructionBase::InstructionType(EXTRA);
+    type_ = InstructionBase::InstructionType();
     DCHECK(reinterpret_cast<void*>(&operand_) == this);
     return *this;
   }