`Phatality ID` got removed more than three years ago in rPHAT96ea0062dd8c9d19cff1bed40b77d33fc9915a11 but not in Phabricator.
[X] Hide that field from Form https://phabricator.wikimedia.org/maniphest/task/edit/form/46/ via https://phabricator.wikimedia.org/transactions/editengine/maniphest.task/view/46/
[ ] Find out which other Forms explosing that field, also hide: `SELECT CONCAT("https://phabricator.wikimedia.org/maniphest/task/edit/form/",id), engineKey, builtinKey, name FROM phabricator_search.search_editengineconfiguration WHERE properties LIKE "%field.name%" AND properties NOT LIKE "%field.name\":\"hidden%";`
[ ] Hide that field from the Maniphest Advanced search by setting `"search": false` for `error.id` in https://phabricator.wikimedia.org/config/edit/maniphest.custom-field-definitions/
[ ] Maybe remove all its entries from fulltext search index (got added in T244330) but need to find its index key first
[ ] Maybe remove that field `error.id` from https://phabricator.wikimedia.org/config/edit/maniphest.custom-field-definitions/ but does break anything in existing Forms?