BUR #34445 has been approved by @nonamethanks.
remove implication ushanka -> fur_hat
Ushankas are traditionally made from fur, but they are not necessarily- at all. Fur hat is also defined as being made completely from fur (https://danbooru.donmai.us/wiki_pages/fur-trimmed_headwear) , but fur-trimmed ushankas are extremely common.
Right now, posts like this are tagged as fur hat because of this implication:
https://danbooru.donmai.us/posts/7929055
https://danbooru.donmai.us/posts/5015867?q=ushanka+portrait+
https://danbooru.donmai.us/posts/6176748?q=ushanka+upper_body+
https://danbooru.donmai.us/posts/7472312?q=ushanka+