bots: Revert hack for invalid grub configs
bots: Revert hack for invalid grub configs

https://bugzilla.redhat.com/show_bug.cgi?id=1601578 got fixed, so revert
that part of commit e940137.

mvollmer/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,deryni/cockpit,deryni/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,cockpituous/cockpit,garrett/cockpit,andreasn/cockpit,garrett/cockpit,andreasn/cockpit,garrett/cockpit,cockpituous/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,deryni/cockpit,mvollmer/cockpit,andreasn/cockpit,cockpituous/cockpit,garrett/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,martinpitt/cockpit,cockpituous/cockpit,mvollmer/cockpit,deryni/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,andreasn/cockpit,deryni/cockpit,moraleslazaro/cockpit,deryni/cockpit,martinpitt/cockpit,cockpituous/cockpit,mvollmer/cockpit,andreasn/cockpit,andreasn/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,deryni/cockpit,andreasn/cockpit,garrett/cockpit,moraleslazaro/cockpit