Remove git rake tasks
What does this MR do?
Remove the git rake tasks:
gitlab:git:prune
gitlab:git:repack
gitlab:git:gc
These happen each 100 pushes, and aren't thus aren't needed. However, fsck provides a sanity check, so it is ported so that stays available to administrators.
What are the relevant issue numbers?
Edited by Zeger-Jan van de Weg