VectorICs: Remove --vector-stores flag.

src/ic/arm/access-compiler-arm.cc

Index: src/ic/arm/access-compiler-arm.cc
diff --git a/src/ic/arm/access-compiler-arm.cc b/src/ic/arm/access-compiler-arm.cc
index 62f554792f44b5d2e323c21e8c75fcb0e04ce7c6..d360f5a62be1ede094717f08e182fd59ebf74c3c 100644
--- a/src/ic/arm/access-compiler-arm.cc
+++ b/src/ic/arm/access-compiler-arm.cc
@@ -31,7 +31,6 @@ Register* PropertyAccessCompiler::store_calling_convention() {
   // receiver, name, scratch1, scratch2, scratch3.
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
-  DCHECK(FLAG_vector_stores || r3.is(StoreTransitionDescriptor::MapRegister()));
   static Register registers[] = {receiver, name, r3, r4, r5};
   return registers;
 }