[tubofan] Remove .dot output of --trace-turbo

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 801c97aa7c684efd2130c973f51a94b17ec1495a..8a31843ed081df16219d360758f4cb85ba0ddb65 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -1000,14 +1000,6 @@ struct PrintGraphPhase {
     CompilationInfo* info = data->info();
     Graph* graph = data->graph();
 
-    {  // Print dot.
-      FILE* dot_file = OpenVisualizerLogFile(info, phase, "dot", "w+");
-      if (dot_file == nullptr) return;
-      OFStream dot_of(dot_file);
-      dot_of << AsDOT(*graph);
-      fclose(dot_file);
-    }
-
     {  // Print JSON.
       FILE* json_file = OpenVisualizerLogFile(info, NULL, "json", "a+");
       if (json_file == nullptr) return;