label 怎么删除echarts 折线配置项内容和展示

      function randomData() {
    now = new Date(+now + oneDay);
    value = value + Math.random() * 21 - 10;
    return {
        name: now.toString(),
        value: [
            [now.getFullYear(), now.getMonth() + 1, now.getDate(), now.getHours(), now.getMinutes()].join(":"),
            Math.round(value)
        ]
    };
}

var data = [];
var now = +new Date();
var oneDay = 24 * 3600 * 1000;
var oneMinute = 60 * 1000;
var value = Math.random() * 1000;
for (var i = 0; i < 1000; i++) {
    data.push(randomData());
}

option = {

    textStyle: {
        fontSize: 24
    },
    tooltip: {},
    xAxis: {
        name: "Time Perioad",
        nameLocation: "middle", // 你看这个，人家哪里说有 bottom 取值了 http://echarts.baidu.com/option.html#xAxis.nameLocation
        nameGap: 50,
        nameTextStyle: {
            fontSize: "20px",
            fontWeight: "bold",
            fontStyle: "normal"
        },
        type: 'time',
        splitLine: {
            show: false
        }
    },
    yAxis: {
        max: 'dataMax', // 限定 y 轴最大值为数据最大值，这样 MarkArea 就能到最大处
        name: "Fatigue",
        nameTextStyle: {
            fontSize: "20px",
            fontWeight: "normal",
            fontStyle: "normal"
        },

        type: "value",
        boundaryGap: [0, "100%"],
        axisLine: {
            show: false
        },
        axisTick: {
            show: false
        },
        splitLine: {
            show: true
        }
    },
    series: [{
        name: '模拟数据',
        type: 'line',
        showSymbol: false,
        hoverAnimation: false,
        data: data,
        itemStyle: {
            normal: {
                color: '#199CD8',
                borderColor: '#fff',
                borderWith: 1,
                shadowBlur: 2,
                shadowOffsetX: 2,
                shadowOffsetY: 5
            }
        },
        lineStyle: {
            normal: {
                width: 2,
                shadowColor: 'rgba(112, 155, 233, 0.5)',
                shadowBlur: 4,
                shadowOffsetY: 4
            }
        },
        markLine: {
            silent: true,
            symbol: false,
            label: false,
            data: [{
                yAxis: 100
            }, {
                yAxis: 400
            }],
            lineStyle: {
                normal: {
                    type: "solid",
                    color: "#CE1C08"
                }
            }
        },
        markArea: {
            itemStyle: {
                normal: {
                    color: 'red',
                    borderColor: '#fff',
                    borderWith: 1,
                    shadowBlur: 2,
                    shadowOffsetX: 2,
                    shadowOffsetY: 5
                }
            },
            data: [ // 原来这里少了一层 [ ]
                [{
                    name: '两个屏幕坐标之间的标域',
                    yAxis: 0
                }, {
                    yAxis: 200
                }], 
                [{
                    name: 'xxx',
                    yAxis: 600
                }, {
                    type: 'max'
                }]
            ]
        }
    }]
};