去除elementUI中tab组件中的下划线

<div class="right-tabbox-newnotice">
    <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="通知" name="first">

        </el-tab-pane>

    </el-tabs>
</div>

  .right-tabbox-newnotice /deep/.el-tabs__nav-wrap::after {
      position: static !important;
  }

或者
.right-tabbox-newnotice >>>.el-tabs__nav-wrap::after {
      position: static !important;
  }