Deprecate gunbelt

BUR #32476 has been rejected.

deprecate gunbelt

After some reconsideration, it turns up to be basically a padding for holster belt. Even so, it has been haphazardly used to describe modern utility belts (post #8179381).

This bulk update request is pending automatic rejection in 5 days.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #32476 (forum #311034) has been rejected by @DanbooruBot.