user: remove entirely redundant remote_or_auth_active?/1.

auth_active?/1 can check remote users and return true directly.
2 jobs for hotfix/media-proxy-uri in 3 minutes and 21 seconds (queued for 2 seconds)
Name Stage Failure
unit-testing Test
* test Kocaptcha new and validate * test Kocaptcha new and validate (0.1ms)

Finished in 76.0 seconds
787 tests, 2 failures, 10 skipped

Randomized with seed 745704
ERROR: Job failed: exit code 1