settings: Remove id column from subscriber list.

Fixes part of #25483.

web/templates/stream_settings/stream_member_list_entry.hbs

@@ -8,7 +8,6 @@
     {{else}}
     <td class="hidden-subscriber-email">{{t "(hidden)"}}</td>
     {{/if}}
-    <td class="subscriber-user-id">{{user_id}}</td>
     {{#if can_remove_subscribers}}
     <td class="unsubscribe">
         <div class="subscriber_list_remove">

web/templates/stream_settings/stream_members.hbs

@@ -23,7 +23,6 @@
                 <thead class="table-sticky-headers">
                     <th data-sort="alphabetic" data-sort-prop="full_name">{{t "Name" }}</th>
                     <th data-sort="email">{{t "Email" }}</th>
-                    <th data-sort="id">{{t "User ID" }}</th>
                     {{#if can_remove_subscribers}}
                     <th class="actions">{{t "Actions" }}</th>
                     {{/if}}