Revert "Merge branch 'sh-create-fork-with-object-pool' into 'master'"
This reverts merge request !2887 (merged) because currently Praefect expects a field with the additional_repository
tag always to be present, or Praefect will fail the RPC outright in https://gitlab.com/gitlab-org/gitaly/blob/2074eaf506f32b3a2116451b5e2e547dac5aa3e6/internal%2Fpraefect%2Fcoordinator.go#L602-605.
This causes CreateFork
without the requisite changes to fail badly if the RPC is intercepted by Praefect.
Relates to #3379 (closed)
Edited by Stan Hu