* Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/351520
* Sentry error:
https://sentry.gitlab.net/gitlab/gitlabcom/issues/3237376

**Problem**

Double call of respond_to causes
ActionController::RespondToMismatchError

**Solution**

We already render 404 page for missing formats, because of that we can
remove unnecessary responder.

Changelog: changed