DevTools: Remove unused code after service/shared worker inspection migration to main thread.

Source/core/workers/WorkerObjectProxy.cpp

Index: Source/core/workers/WorkerObjectProxy.cpp
diff --git a/Source/core/workers/WorkerObjectProxy.cpp b/Source/core/workers/WorkerObjectProxy.cpp
index 03f780dfb0d2a228573e720b77d8a19c9950d86b..cec77c2f85b8e9489336fdc265663e7014a69608 100644
--- a/Source/core/workers/WorkerObjectProxy.cpp
+++ b/Source/core/workers/WorkerObjectProxy.cpp
@@ -83,11 +83,6 @@ void WorkerObjectProxy::postMessageToPageInspector(const String& message)
         toDocument(m_executionContext)->postInspectorTask(createCrossThreadTask(&WorkerMessagingProxy::postMessageToPageInspector, m_messagingProxy, message));
 }
 
-void WorkerObjectProxy::updateInspectorStateCookie(const String&)
-{
-    notImplemented();
-}
-
 void WorkerObjectProxy::workerGlobalScopeClosed()
 {
     m_executionContext->postTask(createCrossThreadTask(&WorkerMessagingProxy::terminateWorkerGlobalScope, m_messagingProxy));