[turbofan] Remove bogus constant materialization from frame.

src/compiler/s390/code-generator-s390.cc

Index: src/compiler/s390/code-generator-s390.cc
diff --git a/src/compiler/s390/code-generator-s390.cc b/src/compiler/s390/code-generator-s390.cc
index 4d9553c16ff26cfb0d227da4517df88778aed926..6ead82b211fdc1889f82f961978688a6ee8a67b4 100644
--- a/src/compiler/s390/code-generator-s390.cc
+++ b/src/compiler/s390/code-generator-s390.cc
@@ -2379,10 +2379,7 @@ void CodeGenerator::AssembleMove(InstructionOperand* source,
         case Constant::kHeapObject: {
           Handle<HeapObject> src_object = src.ToHeapObject();
           Heap::RootListIndex index;
-          int slot;
-          if (IsMaterializableFromFrame(src_object, &slot)) {
-            __ LoadP(dst, g.SlotToMemOperand(slot));
-          } else if (IsMaterializableFromRoot(src_object, &index)) {
+          if (IsMaterializableFromRoot(src_object, &index)) {
             __ LoadRoot(dst, index);
           } else {
             __ Move(dst, src_object);