Remove grid line from flot Chart using jQuery in ASP.Net

I want to set chart grid border visible false

<div class="panel-container show">
<div class="panel-content">
    <h5>Subscription Views / hour</h5>
    <div id="flotBar1" style="width: 100%; height: 160px" ></div>
</div>
</div>
    $.ajax({
        type: 'POST',
        url: '../User/GetAllVerticalbarCharts',
        data: { frmname: "frmDashboard3", "chartid": "Accounts_Payment_" },
        async: false,
        success: function (data) {
            if (data.Result == "Error") {
                alert(data.Result);
            }
            else {
                resultsmallchartdata = JSON.parse(data["jsonchartdata"]);

            }
        }
    });
$.plot('#flotBar1', $.parseJSON(resultsmallchartdata[0]["Data"]), $.parseJSON(resultsmallchartdata[0]["Grid"]),
{
    bar:
    {
        show: true,
        lineWidth: 0,
    }
},
{
    grid:
    {
        borderWidth: 0,
        drawTicks: false
    },
    yaxis:
    {
        grid: {
            display: false
        },

        font:
        {
            color: '#444',
            size: 10
        }
    },
    xaxis:
    {
        grid: {
            display: false
        },
        font:
        {
            color: '#999',
            size: 9
        }
    }
});