[IMPROVE] Remove isomorphic index files from folders

[MarcosSpessatto]

• [x] 2fa
• [x] accounts
• [x] action-links
• [x] analytics
• [x] api
• [x] apps
• [x] assets
• [ ] authorization
• [x] autolinker
• [x] autotranslate
• [x] bigbluebutton
• [x] blockstack
• [x] bot-helpers
• [x] callbacks
• [x] cas
• [x] channel-settings
• [x] channel-settings-mail-messages
• [x] chatpal-search
• [x] cloud
• [x] colors
• [x] cors
• [x] crowd
• [ ] custom-oauth
• [x] custom-sounds
• [x] discussion
• [ ] dolphin
• [ ] drupal
• [x] e2e
• [ ] emoji
• [x] emoji-custom
• [ ] emoji-emojione
• [x] error-handler
• [x] favico
• [x] federation
• [x] file
• [x] file-upload
• [x] github-enterprise
• [x] gitlab
• [x] google-vision
• [x] highlight-words
• [x] iframe-login
• [x] importer
• [x] importer-csv
• [x] importer-hipchat
• [x] importer-hipchat-enterprise
• [x] importer-pending-files
• [x] importer-slack
• [x] importer-slack-users
• [x] integrations
• [x] invites
• [x] irc
• [x] issuelinks
• [ ] katex
• [x] lazy-load
• [x] ldap
• [ ] lib
• [ ] livechat
• [x] livestream
• [ ] logger
• [x] mail-messages
• [x] mailer
• [x] mapview
• [ ] markdown
• [x] mentions
• [x] mentions-flextab
• [x] message-action
• [x] message-attachments
• [x] message-mark-as-unread
• [x] message-pin
• [x] message-snippet
• [x] message-star
• [x] meteor-accounts-saml
• [x] meteor-autocomplete
• [x] metrics
• [ ] migrations
• [ ] models
• [x] nextcloud
• [x] notification-queue
• [ ] notifications
• [x] nrr
• [x] oauth2-server-config
• [x] oembed
• [x] otr
• [x] promises
• [x] push
• [x] push-notifications
• [x] reactions
• [x] retention-policy
• [x] search
• [ ] settings
• [x] slackbridge
• [x] slashcommands-asciiarts
• [x] slashcommands-archiverroom
• [x] slashcommands-create
• [x] slashcommands-help
• [x] slashcommands-hide
• [x] slashcommands-invite
• [x] slashcommands-inviteall
• [x] slashcommands-join
• [x] slashcommands-kick
• [x] slashcommands-leave
• [x] slashcommands-me
• [x] slashcommands-msg
• [x] slashcommands-mute
• [x] slashcommands-open
• [x] slashcommands-status
• [x] slashcommands-topic
• [x] slashcommands-unarchiverroom
• [x] slider
• [x] smarsh-connector
• [x] sms
• [x] spotify
• [x] statistics
• [x] theme
• [x] threads
• [x] token-login
• [x] tokenpass
• [x] ui
• [x] ui-account
• [x] ui-cached-collection
• [x] ui-clean-history
• [x] ui-flextab
• [x] ui-login
• [x] ui-master
• [x] ui-message
• [x] ui-sidenav
• [ ] ui-utils
• [x] ui-vrecord
• [x] user-data-download
• [x] user-status
• [ ] utils
• [x] version-check
• [x] videobridge
• [x] webdav
• [x] webrtc
• [x] wordpress
• [ ] ee

[github-actions[bot]]

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