add discovery method default

app/Providers/EventServiceProvider.php

@@ -29,4 +29,14 @@ public function boot()
     {
         //
     }
+
+    /**
+     * Determine if events and listeners should be automatically discovered.
+     *
+     * @return bool
+     */
+    public function shouldDiscoverEvents()
+    {
+        return false;
+    }
 }