I am using the Charts/BarChart and I want to make the y-axis (which is horizontal in the BarChart) invisible.

It should be possible by using something like

"Highcharts.chart({
yAxis:{
visible:false
}
});"

In the AdvancedFormat options, but how??

Found a work around:

The Y-axis shows a percentage from 0-100. In the Y-axis format init I have set the min value to 0, the max value to 100 and the step to 100 as well.

In the AdvancedFormat_Init I have set the YAxisJSON to "showFirstLabel:false,showLastLabel:false"