Addition of a vertical scroll bar as a result of rtd-footer-container on none RTD hosted sites

[andrewcoughtrie]

When hosting on a none RTD site (specifically on GitHub pages in this case) the addition of the rtd-footer-container results in a scroll bar on the primary sidebar even when the length of the list is significantly shorter than the page. Modifying the html of the page and removing the rtd-footer-container fixes this behavior.