Add suggest menu for user mentions in text editor

app/Formatter/BaseFormatter.php

@@ -4,7 +4,6 @@ namespace Kanboard\Formatter;
 
 use Kanboard\Core\Base;
 use PicoDb\Table;
-use Pimple\Container;
 
 /**
  * Class BaseFormatter
@@ -22,19 +21,6 @@ abstract class BaseFormatter extends Base
      */
     protected $query;
 
-    /**
-     * Get object instance
-     *
-     * @static
-     * @access public
-     * @param  Container $container
-     * @return static
-     */
-    public static function getInstance(Container $container)
-    {
-        return new static($container);
-    }
-
     /**
      * Set query
      *