Remove unused l18n messages (#28964)

app/javascript/mastodon/features/compose/components/poll_form.jsx

@@ -18,8 +18,6 @@ import AutosuggestInput from 'mastodon/components/autosuggest_input';
 
 const messages = defineMessages({
   option_placeholder: { id: 'compose_form.poll.option_placeholder', defaultMessage: 'Option {number}' },
-  add_option: { id: 'compose_form.poll.add_option', defaultMessage: 'Add option' },
-  remove_option: { id: 'compose_form.poll.remove_option', defaultMessage: 'Remove this option' },
   duration: { id: 'compose_form.poll.duration', defaultMessage: 'Poll length' },
   type: { id: 'compose_form.poll.type', defaultMessage: 'Style' },
   switchToMultiple: { id: 'compose_form.poll.switch_to_multiple', defaultMessage: 'Change poll to allow multiple choices' },

app/javascript/mastodon/locales/en.json

@@ -145,11 +145,9 @@
   "compose_form.lock_disclaimer": "Your account is not {locked}. Anyone can follow you to view your follower-only posts.",
   "compose_form.lock_disclaimer.lock": "locked",
   "compose_form.placeholder": "What's on your mind?",
-  "compose_form.poll.add_option": "Add option",
   "compose_form.poll.duration": "Poll duration",
   "compose_form.poll.multiple": "Multiple choice",
   "compose_form.poll.option_placeholder": "Option {number}",
-  "compose_form.poll.remove_option": "Remove this option",
   "compose_form.poll.single": "Pick one",
   "compose_form.poll.switch_to_multiple": "Change poll to allow multiple choices",
   "compose_form.poll.switch_to_single": "Change poll to allow for a single choice",