Steps to disable or remove older Mac apps following upgrade to Big Sur

After a user updated her Mac from Mac OS X to Max Big Sur she now receives the messages shown in the screenshots below.

I believe the reason these messages are appearing is because these older apps are incompatible and are not able to run in the newer Mac operating system.

What are the steps to either disable these messages or to uninstall the apps associated with these messages?

I would prefer to simply disable these messages so they will stop appearing rather than uninstalling these apps.