### Check existing issues - [x] I've verified that this request isn't described by any existing issues. ### Request The following commands were deprecated in Snapcraft 8 and removed in Snapcraft 9. Snapcraft 9 provides an error for users still using the deprecated commands. These errors can be removed in Snapcraft 10. This is a follow-up to https://github.com/canonical/snapcraft/issues/5674. * list * list-registered * list-confdb-schemas * list-extensions * list-keys * list-plugins * list-tracks * list-revisions * list-validation-sets * export-login --experimental-login * login --experimental-login * login --with * push * snap (core22 and core24+) ### The problem it solves Code cleanup.