remove point class

[calvinmetcalf]

internally all we really do with this beyond get the x and y variables is use it for mgrs projections. But if we're taking out mgrs projections in 3.0.0, then now there is literally no reason to have point in here. other libraries that use proj4 have their own point classes though all they really need is objects with x and y which they'd be giving it anyway.

[calvinmetcalf]

part 1 is done