chore(admin-ui): remove duplicate back link from merchants filters summary

resources/views/admin/merchants/index.blade.php

@@ -54,11 +54,6 @@
         </div>
         <div class="muted muted-xs mt-6">当前站点列表已接入缓存：{{ $cacheMeta['store'] }} / TTL {{ $cacheMeta['ttl'] }}。</div>
 
-        @if($safeBackForLinks !== '')
-            <div class="mt-10">
-                <a href="{!! $safeBackForLinks !!}" class="muted">← 返回上一页（保留上下文）</a>
-            </div>
-        @endif
     </summary>
 
     <div class="collapsible-body filters-body">