[crankshaft] Get rid of the StoreFrameContext instruction.

src/crankshaft/x87/lithium-codegen-x87.cc

Index: src/crankshaft/x87/lithium-codegen-x87.cc
diff --git a/src/crankshaft/x87/lithium-codegen-x87.cc b/src/crankshaft/x87/lithium-codegen-x87.cc
index 59390b32cdafb7a4543a06e689352eb3040fa96a..01df131d568858dcaa2095e6623a613b79635089 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -5821,13 +5821,6 @@ void LCodeGen::DoLoadFieldByIndex(LLoadFieldByIndex* instr) {
   __ bind(&done);
 }
 
-
-void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
-  Register context = ToRegister(instr->context());
-  __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), context);
-}
-
-
 #undef __
 
 }  // namespace internal