remove user list th

app/views/admins/users/shared/_user_list.html.erb

@@ -5,7 +5,6 @@
       <th width="8%" class="text-left">昵称</th>
       <th width="13%">邮件地址</th>
       <th width="10%">手机号码</th>
-      <th width="7%">角色</th>
       <th width="10%"><%= sort_tag('创建于', name: 'created_on', path: admins_users_path) %></th>
       <th width="10%"><%= sort_tag('最后登录', name: 'last_login_on', path: admins_users_path) %></th>
       <th width="12%">项目数</th>