chore(lint): remove old prettier adapter

[jlizen]

Fix for:

npm run lint


Error: Cannot read config file:
  node_modules/eslint-config-prettier/@typescript-eslint.js

Error: "prettier/@typescript-eslint" has been merged into "prettier"
  in eslint-config-prettier 8.0.0.

This does add a bunch of lint failures once it runs. I could fix it in a different PR if you want.

[djc]

This does add a bunch of lint failures once it runs. I could fix it in a different PR if you want.

Would like to have those in the same commit (so that each commit could ideally pass CI).

[jlizen]

Sure, it will have pretty deep tendrils, but I can lump the cleanup pass in here.

[jlizen]

It looks like CI currently is passing... it might be that I am on a newer toolchain locally or something (or a lint step is not being called). I'll take a look and see if there is a cleanup pass needed on the CI as well.

[djc]

Looks like npm run lint is currently commented out in the CI workflow... probably something to fix, too.