Remove trace() methods for stack-only classes.

third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp

Index: third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp b/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
index 584f5181cd457122f12c8d7e0ff559acd1912b4d..558394c2c61ebb22f2d6b4badccd78cc82c36b42 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/WorkerOrWorkletScriptController.cpp
@@ -66,11 +66,6 @@ class WorkerOrWorkletScriptController::ExecutionState final {
 
   ~ExecutionState() { m_controller->m_executionState = m_outerState; }
 
-  DEFINE_INLINE_TRACE() {
-    visitor->trace(m_errorEventFromImportedScript);
-    visitor->trace(m_controller);
-  }
-
   bool hadException;
   String errorMessage;
   std::unique_ptr<SourceLocation> m_location;