gems: Remove unused rdoc gem
Gems were added and copied from GitLab.git back in the day on a need to add basis. The other way around is much harder, so this change attempts to remove a gem as its gone unused but went unnoticed.
Changelog: removed
Gems were added and copied from GitLab.git back in the day on a need to add basis. The other way around is much harder, so this change attempts to remove a gem as its gone unused but went unnoticed.
Changelog: removed