I really don't care if I get rid of the update or get it I just want this annoying red dot gone. I know that I can not show notifications but I want them.
I did what the notification told me to do but I was unable to remove or update the file. Any help would be greatly appreciated.
According to the error message, the problem is caused by something in the file /etc/apt/sources.list.d/itchio.list
I'm assuming this is part of itch.io. You have a few options:
Remove itch.io using the appropriate method for doing so. If this involves removing a package, you may need to purge the package rather than just removing it.
Edit the above file to identify where the problem is (it's in the first entry) and try and fix it.
Contact the makers of itch.io for help with the problem.