Removing the thick line at origin

[SeloSlav]

I'm using version 2.8.0

Is it possible to remove the thick line at the horizontal axis, or to at least make it thinner like the others?

My reason for wanting to do so is because the label "1kg" in my example here actually has the value 0. I've set up my y axis to map the equation's exponents, so 10^0 = 1kg,10^1 = 10kg, 10^2 = 100kg, etc.

I don't want a line at 0 at all.

yAxes: [{
    display: true,
    scaleLabel: {
        labelString: []
    },
    ticks: {
        min: -2,
        beginAtZero: false,
        stepSize: 1,
        callback: function(label, index, labels) {
            if ((label > index) && (label < index + 1))
                return Math.pow(10, parseFloat(label / index).toFixed(2)) + " kg";
            else return Math.pow(10, parseFloat(label).toFixed(1)) + " kg";
        }
    }
}]

[nagix]

To remove it:

yAxes: [{
    gridLines: {
        zeroLineWidth: 0
    },
    // ...

To make it thinner like the others:

yAxes: [{
    gridLines: {
        zeroLineColor: 'rgba(0, 0, 0, 0.1)'
    },
    // ...
}

[benmccann]

Closing as solved