Remove `not use web service` comment in alert server (#11819)

dolphinscheduler-alert/dolphinscheduler-alert-server/src/main/java/org/apache/dolphinscheduler/alert/AlertServer.java

@@ -59,11 +59,6 @@ public class AlertServer implements Closeable {
         this.alertConfig = alertConfig;
     }
 
-    /**
-     * alert server startup, not use web service
-     *
-     * @param args arguments
-     */
     public static void main(String[] args) {
         Thread.currentThread().setName(Constants.THREAD_NAME_ALERT_SERVER);
         new SpringApplicationBuilder(AlertServer.class).run(args);