Remove script collected debug event.

src/debug.h

Index: src/debug.h
diff --git a/src/debug.h b/src/debug.h
index 9e1098646006966465e1970f6e6b90581c63c3af..c295df2654bcf1b30c878d8a900386ba7becd430 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -159,9 +159,6 @@ class ScriptCache : private HashMap {
   // Return the scripts in the cache.
   Handle<FixedArray> GetScripts();
 
-  // Generate debugger events for collected scripts.
-  void ProcessCollectedScripts();
-
  private:
   // Calculate the hash value from the key (script id).
   static uint32_t Hash(int key) {
@@ -176,8 +173,6 @@ class ScriptCache : private HashMap {
       const v8::WeakCallbackData<v8::Value, void>& data);
 
   Isolate* isolate_;
-  // List used during GC to temporarily store id's of collected scripts.
-  List<int> collected_scripts_;
 };
 
 
@@ -370,7 +365,6 @@ class Debug {
   void OnCompileError(Handle<Script> script);
   void OnBeforeCompile(Handle<Script> script);
   void OnAfterCompile(Handle<Script> script);
-  void OnScriptCollected(int id);
 
   // API facing.
   void SetEventListener(Handle<Object> callback, Handle<Object> data);
@@ -477,9 +471,6 @@ class Debug {
   // Record function from which eval was called.
   static void RecordEvalCaller(Handle<Script> script);
 
-  // Garbage collection notifications.
-  void AfterGarbageCollection();
-
   // Flags and states.
   DebugScope* debugger_entry() { return thread_local_.current_debug_scope_; }
   inline Handle<Context> debug_context() { return debug_context_; }
@@ -544,7 +535,6 @@ class Debug {
       Handle<Object> promise);
   MUST_USE_RESULT MaybeHandle<Object> MakeCompileEvent(
       Handle<Script> script, v8::DebugEvent type);
-  MUST_USE_RESULT MaybeHandle<Object> MakeScriptCollectedEvent(int id);
 
   // Mirror cache handling.
   void ClearMirrorCache();