如何在chartjs中跳过多线图中线条的标签？

var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
        datasets: [{
            label: 'Line 1',
            data: [10, 20, 30, 40, 50, 60, 70],
            borderColor: 'red',
            fill: false
        }, {
            label: 'Line 2',
            data: [70, 60, 50, 40, 30, 20, 10],
            borderColor: 'blue',
            fill: false
        }]
    },
    options: {
        legend: {
            display: false
        }
    }
});