def clear():
    """
    @api {post} /map/poihistory/clear 清空历史
    @apiVersion 1.0.0
    @apiGroup History
    @apiDescription  清空历史

    @apiParam (Headers) {String} token 令牌
    @apiParam (Headers) {String} device_token 设备令牌
    @apiParam (Headers) {String} content_type 内容类型
    @apiParam (Headers) {String} timestamp 时间戳
    @apiParam (Headers) {String} location 经纬度

    @apiSuccess (Success) {String} data 成功标识

    @apiSuccessExample {json} Success-Response:
    {
        "data": "Success.",
        "req_id": "r_cf9f3d0170b142ffb5bc2b0bcea97501",
        "err_resp": {
            "code": "0",
            "msg": null
        }
    }
    """
