Remove more Ruby code for 100% on user_delete_{branch,tag} in Go feature
A follow-up to fbc9f83a (Remove Ruby code for 100% on user_delete_{branch,tag} in Go feature, 2021-01-15). This Ruby code is also dead now, and should be removed per a comment from @toon at !3010 (comment 488175228)
Edited by Toon Claes