消息管理/系统公告：暂无附件显示修改

src/views/News/notice.vue

@@ -12,7 +12,7 @@
           <el-table-column prop="attach_file" label="附件" :show-overflow-tooltip="true" align="center">
             <template slot-scope="scope">
               <a :href="scope.row.attachment_url" class="alink" target="_blank" v-if="scope.row.attachment_name">{{ scope.row.attachment_name }}</a>
-              <span v-else>暂无附件</span>
+              <span v-else>-</span>
             </template>
           </el-table-column>
           <el-table-column prop="create_time" label="创建时间" :show-overflow-tooltip="true" align="center"></el-table-column>