Simplify TurboFan's c1visualizer file handling.

src/compiler/pipeline.h

Index: src/compiler/pipeline.h
diff --git a/src/compiler/pipeline.h b/src/compiler/pipeline.h
index 87c22a6aeba25fbc5e481a7e218efb9f4f2d6ad8..cf4fa5e1d74cd93d62bd1c5355a280f34decef3a 100644
--- a/src/compiler/pipeline.h
+++ b/src/compiler/pipeline.h
@@ -5,8 +5,6 @@
 #ifndef V8_COMPILER_PIPELINE_H_
 #define V8_COMPILER_PIPELINE_H_
 
-#include <fstream>  // NOLINT(readability/streams)
-
 #include "src/v8.h"
 
 #include "src/compiler.h"
@@ -53,12 +51,6 @@ class Pipeline {
   Zone* zone() { return info_->zone(); }
 
   Schedule* ComputeSchedule(ZonePool* zone_pool, Graph* graph);
-  void OpenTurboCfgFile(std::ofstream* stream);
-  void PrintCompilationStart();
-  void PrintScheduleAndInstructions(const char* phase, const Schedule* schedule,
-                                    const SourcePositionTable* positions,
-                                    const InstructionSequence* instructions);
-  void PrintAllocator(const char* phase, const RegisterAllocator* allocator);
   void VerifyAndPrintGraph(Graph* graph, const char* phase,
                            bool untyped = false);
   Handle<Code> GenerateCode(ZonePool* zone_pool, Linkage* linkage, Graph* graph,