Drop `run-st`

[WinstonHartnett]

The issue behind run-st was closed and run-st holds back new primitive-unlifted versions. I'm assuming you can replace the specialized version of runST w/ runST now?

[chessai]

ping @andrewthad

[andrewthad]

I've confirmed that removing run-st does not cause a regression in #33

I'll merge it soon.

[brianjosephmckeon]

Added to release 0.3.11.1 and published to Hackage.
https://github.com/byteverse/bytesmith/releases/tag/0.3.11.1