Deprecated API cleanup

[antoniovazquezblanco]

It seems there is some older codebase no longer used awaiting for cleanup. This an initial attempt. If I missed something or went to wild in any other part please let me know in order to fix it.

Also, this may require an API version bump to avoid compatibility problems.

If you prefer not to delete de code, if you want me to do so, I could mark the API as deprecated via attributes as a last warning before deleting it.

Thanks

[BatchDrake]

Merge done, thanks!

[antoniovazquezblanco]

Yw!