This bug should track the plans to deprecate the redlink removal sometimes in the future.
Related gerrit discussion (from https://gerrit.wikimedia.org/r/#/c/135120/):
MaxSem: We have plans to deprecate red link removal completely, we'd better go down that road.
Florianschmidtwelzow: @MaxSem: Ah, ok, that i don't know :) Then, it's better to don't merge this commit, so nobody get confused with a new config deprecate in next versions :)
MaxSem: I'd say wait a bit for redlinks promotion to stable, because the solution it this commit would be way too temporary:)