Fix types for extensions (#5901)

* Fix types for extensions
To accompany https://github.com/FreshRSS/Extensions/pull/185

* Avoid bug redeclared function

app/Controllers/javascriptController.php

@@ -5,7 +5,6 @@ class FreshRSS_javascript_Controller extends FreshRSS_ActionController {
 
 	/**
 	 * @var FreshRSS_ViewJavascript
-	 * @phpstan-ignore-next-line
 	 */
 	protected $view;