[crankshaft] Get rid of the StoreFrameContext instruction.

src/crankshaft/arm64/lithium-arm64.cc

Index: src/crankshaft/arm64/lithium-arm64.cc
diff --git a/src/crankshaft/arm64/lithium-arm64.cc b/src/crankshaft/arm64/lithium-arm64.cc
index 750a6daf581b292ae3482ada7de8cfc186d7b2b3..b25d3c3aac92bb8ea8520ae4ac5986787039af40 100644
--- a/src/crankshaft/arm64/lithium-arm64.cc
+++ b/src/crankshaft/arm64/lithium-arm64.cc
@@ -2653,12 +2653,5 @@ LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   return AssignEnvironment(DefineAsRegister(result));
 }
 
-
-LInstruction* LChunkBuilder::DoStoreFrameContext(HStoreFrameContext* instr) {
-  LOperand* context = UseRegisterAtStart(instr->context());
-  return new(zone()) LStoreFrameContext(context);
-}
-
-
 }  // namespace internal
 }  // namespace v8