Remove anti-scrapping notices from the royal road scrapping results

[sidit77]

Currently chapters from RoyalRoad contain one paragraph with a message like

If you encounter this story on Amazon, note that it's taken without permission from the author. Report it.

On the website this notice is hidden with a simple CSS rules like this:

.cjNlMmQwM2QxYzVjMjRjOTlhMmI0ZTNkNmExODkwN2Qy{
    display: none;
    speak: never;
}

This PR add some code find rules like this and remove the respective elements from the HTML tree.