Hi Yuvraj,
Thanks for your interest in Syncfusion products.
We had a look in to your snapshot and found that you have mis-understood the default Secondary Axis as a line indicating the range. As we have already mentioned we will consider," Hiding the Axis" as a feature request.
As a work around you can add a series to the default axis so that you dont have excess axes.
For your reference I have created a sample and you could download from the below given link
http://websamples.syncfusion.com/samples/WPF/ChartMultipleAxesSample/ChartMultipleAxes.zip Please let us know if you have any queries.
Regards,
Pavithra.J