Remove pyairports

[lapp0]

What behavior of the library made you think about the improvement?

We currently rely on a poorly maintained package, pyairports. The way this package is structured has caused a few build / test issues

• Fix PyPi deployment workflow - missing pycountry and pyairports #934
• Exllamav2 Integration #1010 (comment)
• I've run into a few unreported headaches trying to test with pyairports as well.

The only use for pyairports in outlines is outlines.types.airports, in which we load AIRPORT_IATA_LIST. pyairports isn't maintained, so the list is presumably out of date.

How would you like it to behave?

We should remove the pyairports dependency and use a different package.

import airportsdata
IATA_CODES = sorted(airportsdata.load().keys())

[cpfiffer]

Bump on this one. It's kind of an annoying issue, I often have to install setuptools and I believe it's the only package I need it for.