I went to upgrade from Win 7 to Win 10 and didn't have the 10 MG of free space. So I thought I could get additional space for other partition space on the same drive. Now I have a drive with OSX extended, an unnamed partition and a boot camp partition. Because of this third partition Boot Camp will not let me remove and merge the space back as one OSX drive. How to I remove Boot Camp and recover all the space to a single drive?