[4.1] Gettting the router should not be static

libraries/src/Application/AdministratorApplication.php

@@ -199,7 +199,7 @@ protected function doExecute()
 	 *
 	 * @since	3.2
 	 */
-	public static function getRouter($name = 'administrator', array $options = array())
+	public function getRouter($name = 'administrator', array $options = [])
 	{
 		return parent::getRouter($name, $options);
 	}

libraries/src/Application/CMSApplication.php

@@ -597,7 +597,7 @@ public function getPathway()
 	 *
 	 * @since   3.2
 	 */
-	public static function getRouter($name = null, array $options = array())
+	public function getRouter($name = null, array $options = [])
 	{
 		$app = Factory::getApplication();
 
@@ -1062,7 +1062,7 @@ protected function route()
 		// Get the full request URI.
 		$uri = clone Uri::getInstance();
 
-		$router = static::getRouter();
+		$router = $this->getRouter();
 		$result = $router->parse($uri, true);
 
 		$active = $this->getMenu()->getActive();

libraries/src/Application/CMSWebApplicationInterface.php

@@ -53,7 +53,7 @@ public function getMenu($name = null, $options = array());
 	 *
 	 * @since   4.0.0
 	 */
-	public static function getRouter($name = null, array $options = array());
+	public function getRouter($name = null, array $options = []);
 
 	/**
 	 * Gets a user state.

libraries/src/Application/SiteApplication.php

@@ -378,7 +378,7 @@ public function getPathway($name = 'site', $options = array())
 	 *
 	 * @since	3.2
 	 */
-	public static function getRouter($name = 'site', array $options = array())
+	public function getRouter($name = 'site', array $options = [])
 	{
 		return parent::getRouter($name, $options);
 	}