Fix i18n

app/soapbox/locales/en.json

@@ -767,7 +767,6 @@
   "gdpr.message": "{siteTitle} uses session cookies, which are essential to the website's functioning.",
   "gdpr.title": "{siteTitle} uses cookies",
   "getting_started.open_source_notice": "{code_name} is open source software. You can contribute or report issues at {code_link} (v{code_version}).",
-  "group.admin_subheading": "Group administrators",
   "group.cancel_request": "Cancel Request",
   "group.group_mod_authorize": "Accept",
   "group.group_mod_authorize.success": "Accepted @{name} to group",
@@ -793,7 +792,6 @@
   "group.leave": "Leave Group",
   "group.leave.success": "Left the group",
   "group.manage": "Manage Group",
-  "group.moderator_subheading": "Group moderators",
   "group.privacy.locked": "Private",
   "group.privacy.public": "Public",
   "group.role.admin": "Admin",
@@ -801,7 +799,6 @@
   "group.tabs.all": "All",
   "group.tabs.members": "Members",
   "group.upload_banner": "Upload photo",
-  "group.user_subheading": "Users",
   "groups.discover.popular.empty": "Unable to fetch popular groups at this time. Please check back later.",
   "groups.discover.popular.title": "Popular Groups",
   "groups.discover.search.error.subtitle": "Please try again later.",