Cleanup tests imports

scripts/travis.sh

server/helpers/ffmpeg-utils.ts

server/lib/user.ts

server/models/account/user.ts

server/models/oauth/oauth-token.ts

server/tests/api/activitypub/security.ts

server/tests/api/users/index.ts

server/tests/api/videos/video-blacklist-management.ts

server/tests/api/videos/video-channels.ts

server/tests/api/videos/video-schedule-update.ts

server/tests/api/videos/video-transcoder.ts

server/tests/utils/index.ts

server/tests/utils/requests/check-api-params.ts

server/tests/utils/search/videos.ts

server/tests/utils/server/config.ts

server/tests/utils/server/jobs.ts

server/tests/utils/server/stats.ts

server/tests/utils/users/accounts.ts

server/tests/utils/users/blocklist.ts

server/tests/utils/users/user-subscriptions.ts