Remove onboarding steps handled by gluebuddy

Since [1][2].

[1] gluebuddy@8a105288
[2] !524

.gitlab/issue_templates/Onboarding.md

@@ -42,8 +42,6 @@ https://www.gnupg.org/gph/en/manual/x135.html
   address**, as well as the clearsigned representation of this data), remove
   the description history and make the issue non-confidential.
 - [ ] Request staff cloak on Libera Chat ([Group contacts](https://wiki.archlinux.org/title/Arch_IRC_channels#Libera_Chat_group_contacts))
-- [ ] Go to [Arch Linux group](https://gitlab.archlinux.org/groups/archlinux/-/group_members) -> Enter Admin mode -> go to members -> add username as "minimal access"
-- [ ] Go to [Arch Staff group](https://gitlab.archlinux.org/groups/archlinux/teams/staff/-/group_members) -> Enter Admin mode -> go to members -> add username as "reporter"
 
 ## Packager onboarding checklist