Clean depreciated functions/macros out

[awb99]

Hi @leonoel !

I think removing depreciated Functions and Macros would help users to use missionary.

You could do this for example on a major release where you clearly mark the breaking change.

I say this because you have a big missionary.core namespace .. and I find it hard to navigate the cljdocs. There are a lot of hard to digest concepts in missionary .. and finding the right function takes time.

I know you did keep the depreciated stuff for compatibility. But perhaps you want to consider moving them out in one breaking release.

In the minimum you should remove outdated
Functions/macros from cljdoc. This should be 100% safe because in cljdoc you can select the version.

Thanks!