Need to remove secondary Y axis scale numbers from Combination chart in Dashboard 4.0

Hello all,

I am using Dashboard 4.0 and combination chart. Earlier in combination chart, we had secondary Y axis and scale numbers on secondary Y axis. When I remove secondary Y axis and scale numbers, 0(min scale) and 1 (max scale) are not going off, they are still in the chart. How to remove them.

Thanks,

Renu