Delete Y-axis on combination charts

Hi All, 

I have created a combo chart (column/line). The data vary greatly in size so the line chart is on the secondary axis.  I usually like to add data labels to simple charts and get rid of the y-axis. However, when I get rid of the y-axis on these charts, the data on the secondary axis appears to now apply to the first. Is it possible to have a combination chart with one of the data groups on a secondary axis and delete both y-axis from the chart? 

Thanks