Remove migrated irc-meetings jobs
Remove migrated irc-meetings jobs

The legacy job was migrated to a native v3 in-tree job.
Remove the legacy job.

Needed-By: I5f61fa30116f5ef5403f4a5919ebbf865265f0fa
Depends-On: I48f00531687bb8488283b964ee64fa4c5706bc0e
Change-Id: Ida25d6b612474b9e42e16cf00bc3059c421796ef

openstack-infra/project-config,openstack-infra/project-config