Removed ANA code.

The Cython wrapper is a pain in the arse and even at EuroScipy with help its near impossible.

Until it can be written, it should be removed from core SunPy as ultimately as it stands it is more of a liability than an asset. Maybe it will return as a sunkit in the future. 

It did install and pass all tests on my machine. So things should be fine expect the commit history but oh well.