Revert of [Tracing] V8 Tracing Controller

include/libplatform/libplatform.h

Index: include/libplatform/libplatform.h
diff --git a/include/libplatform/libplatform.h b/include/libplatform/libplatform.h
index 646c7640da4eabc90492cf47f865d38d3192721f..f180b4fe82ef33ee4621c15c55c527ec7aad06db 100644
--- a/include/libplatform/libplatform.h
+++ b/include/libplatform/libplatform.h
@@ -5,7 +5,6 @@
 #ifndef V8_LIBPLATFORM_LIBPLATFORM_H_
 #define V8_LIBPLATFORM_LIBPLATFORM_H_
 
-#include "include/libplatform/v8-tracing.h"
 #include "v8-platform.h"  // NOLINT(build/include)
 
 namespace v8 {
@@ -32,14 +31,6 @@
  */
 bool PumpMessageLoop(v8::Platform* platform, v8::Isolate* isolate);
 
-/**
- * Attempts to set the tracing controller for the given platform.
- *
- * The |platform| has to be created using |CreateDefaultPlatform|.
- */
-void SetTracingController(
-    v8::Platform* platform,
-    v8::platform::tracing::TracingController* tracing_controller);
 
 }  // namespace platform
 }  // namespace v8