There should be the option on individual tags within the tag list to delete that tag.
quay/quay#2117: ui: adding delete tag by row (PROJQUAY-5933)
Merge request - Updated US source to: c62dae1 ui: adding delete tag by row (PROJQUAY-5933) (#2117)
Merge request - Updated US source to: d2b8cdd build(deps): bump stripe from 5.2.0 to 5.5.0 (#2127)