[turbofan] Remove dead code from SimplifiedLowering.

src/compiler/simplified-lowering.cc

 // Copyright 2014 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/compiler/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 2317 matching lines @@
   NodeInfo* GetInfo(Node* node) {
     DCHECK(node->id() >= 0);
     DCHECK(node->id() < count_);
     return &info_[node->id()];
   }
   Zone* zone() { return zone_; }
   Zone* graph_zone() { return jsgraph_->zone(); }
 };
 
 SimplifiedLowering::SimplifiedLowering(JSGraph* jsgraph, Zone* zone,
-                                       SourcePositionTable* source_positions,
-                                       Flags flags)
+                                       SourcePositionTable* source_positions)
     : jsgraph_(jsgraph),
       zone_(zone),
       type_cache_(TypeCache::Get()),
-      flags_(flags),
       source_positions_(source_positions) {}
 
 void SimplifiedLowering::LowerAllNodes() {
   RepresentationChanger changer(jsgraph(), jsgraph()->isolate());
   RepresentationSelector selector(jsgraph(), zone_, &changer,
                                   source_positions_);
   selector.Run(this);
 }
 
 void SimplifiedLowering::DoJSToNumberTruncatesToFloat64(
@@ skipping 934 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8