framework/RedKiteCms/Content/PageCollection/PermalinkManager.php
public function remove($permalink)
    {
        if (array_key_exists($permalink, $this->permalinks)) {
            unset($this->permalinks[$permalink]);
        }

        return $this;
    }
public function remove($permalink)
    {
        if (array_key_exists($permalink, $this->permalinks)) {
            unset($this->permalinks[$permalink]);
        }

        return $this;
    }
Removes a permalink from the list
@param string $permalink

@return $this