Make MathFloorOfDiv optimization trigger more often

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 1d4ed5f32956b43d0ae4b72a6015774c29076374..78adbfa6630ec9771e75eb16cd7c092b7f157688 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1404,19 +1404,6 @@ bool LChunkBuilder::HasMagicNumberForDivisor(int32_t divisor) {
 }
 
 
-HValue* LChunkBuilder::SimplifiedDividendForMathFloorOfDiv(HValue* dividend) {
-  // A value with an integer representation does not need to be transformed.
-  if (dividend->representation().IsInteger32()) {
-    return dividend;
-  // A change from an integer32 can be replaced by the integer32 value.
-  } else if (dividend->IsChange() &&
-      HChange::cast(dividend)->from().IsInteger32()) {
-    return HChange::cast(dividend)->value();
-  }
-  return NULL;
-}
-
-
 HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) {
   if (CpuFeatures::IsSupported(SUDIV)) {
     // A value with an integer representation does not need to be transformed.