Bug 1907655: remove l10n bump cron task/hook from mozilla-central r=RyanVM,aryx,releng-reviewers,jcristau

Differential Revision: https://phabricator.services.mozilla.com/D216453

.cron.yml

@@ -297,12 +297,10 @@ jobs:
           target-tasks-method: l10n_bump
       run-on-projects:
           - autoland
-          - mozilla-central
           - mozilla-beta
       when:
           by-project:
               autoland: [{hour: 6, minute: 45}, {hour: 18, minute: 45}]
-              mozilla-central: []
               # 4h before launch of `daily-releases`
               mozilla-beta: [{hour: 9, minute: 00}]
               # No default