[5.3] Remove register() from BroadcastServiceProvider

app/Providers/BroadcastServiceProvider.php

@@ -20,14 +20,4 @@ class BroadcastServiceProvider extends ServiceProvider
             return true;
         });
     }
-
-    /**
-     * Register any application services.
-     *
-     * @return void
-     */
-    public function register()
-    {
-        //
-    }
 }