Update translation files

Updated by "Remove blank strings" hook in Weblate.

Translation: Soapbox/Soapbox
Translate-URL: https://hosted.weblate.org/projects/soapbox-pub/soapbox/

app/soapbox/locales/br.json

@@ -57,9 +57,7 @@
   "bundle_column_error.title": "Fazi rouedad",
   "bundle_modal_error.close": "Serriñ",
   "bundle_modal_error.retry": "Klask endro",
-  "chat.welcome.title": "",
   "chat_message_list_intro.leave_chat.message": "",
-  "chat_settings.block.confirm": "",
   "chats.actions.copy": "",
   "chats.actions.delete": "Delete message",
   "chats.actions.report": "Report user",
@@ -80,7 +78,6 @@
   "column.info": "Server information",
   "column.migration": "Account migration",
   "column.notifications": "Notifications",
-  "compose_event.fields.start_time_placeholder": "",
   "compose_form.direct_message_warning": "This post will only be sent to all the mentioned users.",
   "compose_form.message": "Message",
   "compose_form.poll.add_option": "Add a choice",
@@ -121,7 +118,6 @@
   "empty_column.favourited_statuses": "You don't have any favorite posts yet. When you favorite one, it will show up here.",
   "empty_column.favourites": "No one has favorited this post yet. When someone does, they will show up here.",
   "empty_column.home.local_tab": "the {site_title} tab",
-  "event.participants": "",
   "export_data.actions.export": "Export",
   "filters.filters_list_delete": "Delete",
   "hashtag.column_header.tag_mode.any": "or {additional}",