Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/mikehansenme/hide-old-shortcodes/archive/refs/heads/master.zipUpdates itself. It ships its own updater, so new versions appear under Dashboard → Updates.
hide-old-shortcodes
This plugin hides unregistered shortcodes from being shown in the content.
It has a log located at Tools-Hide Old Shortcodes so you can view the shortcodes that were hidden. You can then choose to view the shorcode in the edit screen, allow the shortcode to be viewed in the content, or remove the shortcode.