score:1

Accepted answer

Here is working fiddle for your case: https://jsfiddle.net/narkhedetusshar/v2jydeq1/10/

xAxis: {
    tickInterval: 45,
    min: 0,
    max: 360,
    lineWidth: 0, // you need to add this line 
    labels: {
        format: '{value}°'
    }
},

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