This reverts commit 42cc9e61fb.
tgcrypto was made for Pyrogram, and seeing it used elsewhere
without much credit "hurts" the author. I personally do not endorse
its use, hence the lack of attention or notes in the documentation.
People who still want to benefit from the speed boost should go
out of their way to discover, install and patch Telethon's aes.py
module instead, all while complying with the respective license
(another reason to avoid said code in Telethon, which is under the
much more permissive MIT license).
People using tgcrypto for anything other than Pyrogram will do so
knowing full-well that this was not the library's intended usage.
4d3ff0e175