取消单选框选中状态

   <el-radio-group v-model="drawer_data.check_conclusion">
          <el-radio @click.native.prevent="get_check_conclusion(1)" :label="1"> 合格</el-radio>
          <el-radio @click.native.prevent="get_check_conclusion(0)" :label="0"> 不合格</el-radio>
   </el-radio-group>
   
   
     get_check_conclusion(e) {
      e === this.drawer_data.check_conclusion ? (this.drawer_data.check_conclusion = "") : (this.drawer_data.check_conclusion = e);
    },