Fix logic error in assert in IsUndeclaredGlobal()

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 849e99e230c6e926e9e4c2d6d5cebe777422a9cb..40ec55ef669184c7c41d1d96d70f67add340916c 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1948,16 +1948,6 @@ LInstruction* LChunkBuilder::DoStoreGlobalCell(HStoreGlobalCell* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreGlobalGeneric(HStoreGlobalGeneric* instr) {
-  LOperand* context = UseFixed(instr->context(), rsi);
-  LOperand* global_object = UseFixed(instr->global_object(), rdx);
-  LOperand* value = UseFixed(instr->value(), rax);
-  LStoreGlobalGeneric* result =
-      new(zone()) LStoreGlobalGeneric(context, global_object, value);
-  return MarkAsCall(result, instr);
-}
-
-
 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
   LOperand* context = UseRegisterAtStart(instr->value());
   LInstruction* result =