removed unneeded async

lib/frame-tree/content/content-frame-tree.js

@@ -162,9 +162,7 @@ this.frameTree = this.frameTree || (() => {
 			} catch (error) {
 				/* ignored */
 			}
-			setTimeout(async () => {
-				sendInitResponse({ framesData: [{ windowId, processed: true }], sessionId });
-			}, TIMEOUT_INIT_REQUEST_MESSAGE);
+			setTimeout(() => sendInitResponse({ framesData: [{ windowId, processed: true }], sessionId }), TIMEOUT_INIT_REQUEST_MESSAGE);
 		});
 		sendInitResponse({ framesData, sessionId });
 	}