Removing Windows 8 from my MacBook Pro?

Hello,

I currently have windows eight installed on my partition. I want to uninstall it so I will be able to run it with parallel desktop. Parallel currently does not support Windows 8 from Bootcamp.

My question is in order to erase windows 8 what format should I click on? As shown in the screenshot. It was originally highlighted on the last selection ( windows) however, it will not give me the option to erase.

Thanks,

Jonathan