Removing the announcement would depend on how it is being added to the product page. Could you share the URL to one of your product pages so community members can inspect the code? That will help members determine if the code is coming from an app, or if it's something that is hard-coded into your theme. Depending on the outcome will determine what steps you need to take to remove it from your store.
This is an accepted solution.
Thanks! Looks like it's coming from an app. Based on my search, I suspect it might be coming from Ultimate Sales Boost. Do you have this app installed in your store?