Changing content of previous wpmudev posts?

Hi,
Bit of an un-usual one but my client is asking if its possible to remove any reference to their site name from the wpmudev forum posts? for instance this one is appearing in google when searching for their company name

- https://premium.wpmudev.org/forums/topic/hide-3-images-on-home-page-when-on-computer-web-browser-but-show-on-mobile-browser?ppd=b&utm_expid=3606929-28.V9Bw_8diSVaOFQtRZ6k9ZA.1&utm_referrer=https%3A%2F%2Fwww.google.co.uk%2F
(or if at least that one can be removed or hidden from search engine results?)

Thanks

Tom