Removed unused overridden method

See https://github.com/laravel/framework/blob/6.x/src/Illuminate/Support/ServiceProvider.php#L43-L51

src/ApiDocGeneratorServiceProvider.php

@@ -41,15 +41,6 @@ class ApiDocGeneratorServiceProvider extends ServiceProvider
         $this->app->bind(RouteMatcherInterface::class, $this->app['config']['apidoc']['routeMatcher']);
     }
 
-    /**
-     * Register the API doc commands.
-     *
-     * @return void
-     */
-    public function register()
-    {
-    }
-
     /**
      * Initializing routes in the application.
      */