[turbofan] Don't run value numbering with typed lowering.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1019443002

Cr-Commit-Position: refs/heads/master@{#27266}

src/compiler/pipeline.cc

@@ -485,7 +485,6 @@ struct TypedLoweringPhase {
   void Run(PipelineData* data, Zone* temp_zone) {
     SourcePositionTable::Scope pos(data->source_positions(),
                                    SourcePosition::Unknown());
-    ValueNumberingReducer vn_reducer(temp_zone);
     LoadElimination load_elimination;
     JSBuiltinReducer builtin_reducer(data->jsgraph());
     JSTypedLowering typed_lowering(data->jsgraph(), temp_zone);
@@ -493,7 +492,6 @@ struct TypedLoweringPhase {
     SimplifiedOperatorReducer simple_reducer(data->jsgraph());
     CommonOperatorReducer common_reducer(data->jsgraph());
     GraphReducer graph_reducer(data->graph(), temp_zone);
-    AddReducer(data, &graph_reducer, &vn_reducer);
     AddReducer(data, &graph_reducer, &builtin_reducer);
     AddReducer(data, &graph_reducer, &typed_lowering);
     AddReducer(data, &graph_reducer, &intrinsic_lowering);