[Solved]-Highcharts how to remove headers from tooltip-Highcharts

you will have to look into the tooltip options: http://api.highcharts.com/highcharts#tooltip

i added the following bit of code that removed the numbers above kosten

tooltip:{
         headerformat: '',
},

it basically replaces the values from the x axis (0,1,2, etc) in the tooltip with an empty string, therefore it doesn`t appear.

working example: http://jsfiddle.net/4pp1zhfb/5/