@ankit , Were you satisfied with the answer that was provided you on this? It’s been a few years, so you may have found a workaround already. If so, you can mark the answer as accepted, and close the question. If not, and you need more information, let me know. 

If you want to restrict users to use emojis then please use regex. Refer this

https://stackoverflow.com/questions/50929396/regex-for-entering-letters-without-emojis

Or

if your data is already collected and you want to remove it from excel, then you will need to write macro you can refer below link .

https://superuser.com/questions/1259236/how-to-remove-all-emojis-from-excel