This appears to be the result of a copy & paste of data from the internet into MSWord (at least, that has been my experience of seeing that data). If that is the case:
- Copy that symbol from your document (highlight/right-click/copy)
- Use the "Replace" field of the Find & Replace menu (right-hand side of the "Home Ribbon")
- Paste the copied symbol into the "Find what:" section of the same menu
- Leave the "Replace with:" section blank
- Select "Replace All".


That should work. If not, the only other option that I am familiar with is simply highlighting then deleting (or, placing the cursor before or behind each one, then deleting) . Cumbersome, I know.

Hope this helps...