Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

src/app/admin/users/loading.tsx

@@ -1,46 +0,0 @@
-import { Skeleton } from '@/components/ui/skeleton'
-
-export default function UsersLoading() {
-  return (
-    <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
-          <Skeleton className="h-9 w-32" />
-          <Skeleton className="h-5 w-56 mt-2" />
-        </div>
-        <Skeleton className="h-10 w-28" />
-      </div>
-
-      {/* Toolbar */}
-      <div className="flex items-center gap-3">
-        <Skeleton className="h-10 w-64" />
-        <Skeleton className="h-10 w-24" />
-        <Skeleton className="h-10 w-[100px]" />
-      </div>
-
-      {/* Table */}
-      <div className="rounded-md border">
-        <div className="border-b px-4 py-3">
-          <div className="flex gap-8">
-            {Array.from({ length: 6 }).map((_, i) => (
-              <Skeleton key={i} className="h-4 w-20" />
-            ))}
-          </div>
-        </div>
-        {Array.from({ length: 10 }).map((_, i) => (
-          <div key={i} className="flex items-center gap-8 px-4 py-3 border-b last:border-0">
-            <Skeleton className="h-4 w-10" />
-            <div className="flex items-center gap-2">
-              <Skeleton className="h-8 w-8 rounded" />
-              <Skeleton className="h-4 w-24" />
-            </div>
-            <Skeleton className="h-4 w-36" />
-            <Skeleton className="h-5 w-14 rounded-full" />
-            <Skeleton className="h-4 w-16" />
-            <Skeleton className="h-5 w-14 rounded-full" />
-          </div>
-        ))}
-      </div>
-    </div>
-  )
-}