score:1

take a look at this custom code - it hides the last legend group element.

    events: {
        load() {
            const chart = this;
            const alllegenditems = chart.legend.allitems;
            
            alllegenditems[alllegenditems.length - 1].legendgroup.hide();
        }
    }

demo: https://jsfiddle.net/blacklabel/b40ysjgu/

api: https://api.highcharts.com/highcharts/chart.events.load


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