I concur with the “Dismiss” option as well. Prior to removing the plug-in and re-installing, our system was working fine also, and we do not use emojis either. So, in hind sight, if the warning was written something like this:
We need to update your email template database to support emojies. Please take a backup of your databases for your peice of mind. If you do not use emojies, feel free to dismiss this warning.
I would have just dismissed it and not worried about it. Thanks for the quick support Chetna.