[turbofan] Remove dead code from SimplifiedLowering.

src/compiler/pipeline.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/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 921 matching lines @@
     AddReducer(data, &graph_reducer, &escape_reducer);
     graph_reducer.ReduceGraph();
     escape_reducer.VerifyReplacement();
   }
 };
 
 struct RepresentationSelectionPhase {
   static const char* phase_name() { return "representation selection"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SimplifiedLowering::Flags flags =
-        data->info()->is_type_feedback_enabled()
-            ? SimplifiedLowering::kTypeFeedbackEnabled
-            : SimplifiedLowering::kNoFlag;
     SimplifiedLowering lowering(data->jsgraph(), temp_zone,
-                                data->source_positions(), flags);
+                                data->source_positions());
     lowering.LowerAllNodes();
   }
 };
 
 struct EarlyOptimizationPhase {
   static const char* phase_name() { return "early optimization"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     JSGenericLowering generic_lowering(data->jsgraph());
@@ skipping 877 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8