Removes redundant admin badge

Removes the admin badge from the scheduled event card.

The badge was deemed unnecessary as the information it conveyed
is already implicitly clear.

src/modules/nostr-feed/components/ScheduledEventCard.vue

@@ -169,11 +169,6 @@ function cancelMarkComplete() {
           <Badge v-if="isRecurring" variant="outline" class="text-xs">
             🔄
           </Badge>
-
-          <!-- Admin Badge -->
-          <Badge v-if="isAdminEvent" variant="secondary" class="text-xs">
-            Admin
-          </Badge>
         </div>
       </div>
     </CollapsibleTrigger>