Simplify HUnaryMathOperation::Canonicalize.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 1615d4ae66b25a43b1a9a1c99b1c6de82024faa2..1690fb0d72d64e9a6db5ff96e70a1390eeec7b09 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -1295,20 +1295,6 @@ bool LChunkBuilder::HasMagicNumberForDivisor(int32_t divisor) {
 }
 
 
-HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) {
-  // Only optimize when we have magic numbers for the divisor.
-  // The standard integer division routine is usually slower than transitionning
-  // to FPU.
-  if (divisor->IsConstant() &&
-      HConstant::cast(divisor)->HasInteger32Value()) {
-    HConstant* constant_val = HConstant::cast(divisor);
-    return constant_val->CopyToRepresentation(Representation::Integer32(),
-                                                divisor->block()->zone());
-  }
-  return NULL;
-}
-
-
 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
     HValue* right = instr->right();
     LOperand* dividend = UseRegister(instr->left());