[crankshaft] Get rid of the StoreFrameContext instruction.

src/crankshaft/ppc/lithium-ppc.h

Index: src/crankshaft/ppc/lithium-ppc.h
diff --git a/src/crankshaft/ppc/lithium-ppc.h b/src/crankshaft/ppc/lithium-ppc.h
index 7d105b20626e6cfc7361dc48df76a62f002d0b3d..9245f849f627d1b65375ddcd5262eafd4a85f450 100644
--- a/src/crankshaft/ppc/lithium-ppc.h
+++ b/src/crankshaft/ppc/lithium-ppc.h
@@ -131,7 +131,6 @@ class LCodeGen;
   V(StackCheck)                              \
   V(StoreCodeEntry)                          \
   V(StoreContextSlot)                        \
-  V(StoreFrameContext)                       \
   V(StoreKeyed)                              \
   V(StoreKeyedGeneric)                       \
   V(StoreNamedField)                         \
@@ -2403,16 +2402,6 @@ class LLoadFieldByIndex final : public LTemplateInstruction<1, 2, 0> {
 };
 
 
-class LStoreFrameContext : public LTemplateInstruction<0, 1, 0> {
- public:
-  explicit LStoreFrameContext(LOperand* context) { inputs_[0] = context; }
-
-  LOperand* context() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(StoreFrameContext, "store-frame-context")
-};
-
-
 class LChunkBuilder;
 class LPlatformChunk final : public LChunk {
  public: