Remove IsRegExpEquivalent.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 986f4ee16e90ecd2e1156834fe7225878a539e2b..24e5eb8649ebd49f19a80c23dc226b555c8f0712 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -10807,12 +10807,6 @@ void HOptimizedGraphBuilder::GenerateMathSqrt(CallRuntime* call) {
 }
 
 
-// Check whether two RegExps are equivalent
-void HOptimizedGraphBuilder::GenerateIsRegExpEquivalent(CallRuntime* call) {
-  return Bailout(kInlinedRuntimeFunctionIsRegExpEquivalent);
-}
-
-
 void HOptimizedGraphBuilder::GenerateGetCachedArrayIndex(CallRuntime* call) {
   ASSERT(call->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));