Bubble without line

@mit_kumar_sinha

by Amit Sinha

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/highcharts-more.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>

<div id="container" style="height: 400px; min-width: 310px; max-width: 600px; margin: 0 auto"></div>
<a href="javascript:void(0)" class="legendevent">Legend</a>

CSS

.highcharts-tooltip h3 {
    margin: 0.3em 0;
}

JavaScript

//Highcharts.chart('container', {
$('#container').highcharts({
    chart: {
        type: 'bubble',
        plotBorderWidth: 0,
    },
		credits:{
    	enabled: false
    },
    legend: {
        enabled: false
    },

    title: {
        text: 'Risk Map'
    },

    xAxis: {
				gridLineWidth: 0,
				minorGridLineWidth: 0,
        min:0,
        max:10,
        tickInterval:1,
        allowDecimals: true,
        title: {
            text: 'Impact'
        },
        labels: {
            format: '{value}'
        },
        plotLines: [{
            color: 'black',
            dashStyle: 'dash',
            width: 1,
            value: 5,
            label: {
                rotation: 0,
                y: 15,
                style: {
                    fontStyle: 'italic'
                },
                
            },
            zIndex: 3
        }]
    },

    yAxis: {
        gridLineWidth: 0,
				minorGridLineWidth: 0,
        lineWidth:1,
        min:0,
        max:10,
        tickInterval:1,
        allowDecimals: true,
        title: {
            text: 'Likelihood'
        },
        labels: {
            format: '{value}'
        },
        plotLines: [{
            color: 'black',
            dashStyle: 'dash',
            width: 1,
            value: 5,
            label: {
                align: 'right',
                style: {
                    fontStyle: 'italic'
                },
               
                x: -10
            },
            zIndex: 3
        }]
    },
	
    tooltip: {
        useHTML: true,
        headerFormat: '<table>',
        pointFormat: '<tr><th colspan="2"><h3>{point.qname}</h3></th></tr>' +
            '<tr><th>Likelihood:</th><td>{point.x}</td></tr>' +
            '<tr><th>Impact:</th><td>{point.y}</td></tr>',
        footerFormat: '</table>',
        followPointer: true
    },

    plotOptions: {
        series: {
            dataLabels: {
                enabled: true,
                format:...