Remove broken aliases

Related commits:
* Homebrew/homebrew@9977bbd461a97895f28157936b784a937bc23223
* Homebrew/homebrew@287f270ba20113891a5b15d6ba4a66af77b3ec00

Closes #29153.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
lftp 4.4.16

Closes #29190.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
wavpack 4.70.0, youtube-dl 2014.05.05

Update wavpack and youtube-dl to latest stable releases.
youtube-dl: update 2014.05.05 bottle.
wavpack: add 4.70.0 bottle.