[crankshaft] Get rid of the StoreFrameContext instruction.

src/crankshaft/arm/lithium-codegen-arm.cc

Index: src/crankshaft/arm/lithium-codegen-arm.cc
diff --git a/src/crankshaft/arm/lithium-codegen-arm.cc b/src/crankshaft/arm/lithium-codegen-arm.cc
index 62929a2dbb9f53a08871a6ad07001d5def5cabc2..b179a18ff105bb71e2acedd2c3a194fb9c89b036 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -5541,13 +5541,6 @@ void LCodeGen::DoLoadFieldByIndex(LLoadFieldByIndex* instr) {
   __ bind(&done);
 }
 
-
-void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
-  Register context = ToRegister(instr->context());
-  __ str(context, MemOperand(fp, StandardFrameConstants::kContextOffset));
-}
-
-
 #undef __
 
 }  // namespace internal