Revert of [Tracing] V8 Tracing Controller

src/libplatform/tracing/trace-writer.h

-// Copyright 2016 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.
-
-#ifndef SRC_LIBPLATFORM_TRACING_TRACE_WRITER_H_
-#define SRC_LIBPLATFORM_TRACING_TRACE_WRITER_H_
-
-#include "include/libplatform/v8-tracing.h"
-
-namespace v8 {
-namespace platform {
-namespace tracing {
-
-class JSONTraceWriter : public TraceWriter {
- public:
-  explicit JSONTraceWriter(std::ostream& stream);
-  ~JSONTraceWriter();
-  void AppendTraceEvent(TraceObject* trace_event) override;
-  void Flush() override;
-
- private:
-  std::ostream& stream_;
-  bool append_comma_ = false;
-};
-
-}  // namespace tracing
-}  // namespace platform
-}  // namespace v8
-
-#endif  // SRC_LIBPLATFORM_TRACING_TRACE_WRITER_H_