[crankshaft] Get rid of the StoreFrameContext instruction.

src/crankshaft/mips64/lithium-codegen-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/mips64/lithium-codegen-mips64.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/hydrogen-osr.h"
 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h"
@@ skipping 5742 matching lines @@
   __ bind(&out_of_object);
   __ ld(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Dsubu(scratch, result, scratch);
   __ ld(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
-
-void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
-  Register context = ToRegister(instr->context());
-  __ sd(context, MemOperand(fp, StandardFrameConstants::kContextOffset));
-}
-
-
 #undef __
 
 }  // namespace internal
 }  // namespace v8