feat: remove TSLint

[JoshuaKGoldberg]

Fixes #648! 🥳🔪

Now that all the old TSLint rules have been switch to ESLint equivalents, there's no more need for TSLint in dtslint. This PR removes the tslint package reference and tooling around it.

Edit: Actually, one more set of steps. See #866 (comment).

[jakebailey]

Also todo:

• Remove all tslint stuff from DT proper
• Remove code that looks from dt-mergebot
• Maybe, error if tslint.json exists

[jakebailey]

There's one reference left to tslint in packages/dtslint/README.md.

[jakebailey]

CI still fails from knip, but we're close.

[sandersn]

looks good, although it also needs a matching DT PR to remove tslint.jsons there, and a pnpm changeset entry.

[jakebailey]

I have no idea how this didn't fail the changeset test.

[JoshuaKGoldberg]

matching DT PR to remove tslint.jsons there

Right, the existing core TSLint rule disables... blurgh. Will work on that now.

[JoshuaKGoldberg]

I think it'd actually make sense to port the references to core TSLint rules over to ESLint / typescript-eslint (dtslint.json -> tslint.json). Marking as draft until then. Never mind.

[sandersn]

Wait a minute, dt.json and dtslint.json are empty now. At least the ones in packages/dtslint are.

[sandersn]

I deleted tslint.jsons on DT just now: DefinitelyTyped/DefinitelyTyped#67890

I'm going to heat my office by testing locally while I go make breakfast.

[sandersn]

@JoshuaKGoldberg are you talking about the rules that we deleted without moving to eslint? We triaged the rules into good, bad, decent-but-too-much--effort and only kept the good ones.

[jakebailey]

Yeah, once my one comment is fixed, I think this PR is good, so I'm not sure why it's drafted.

[JoshuaKGoldberg]

OH! I did a silly and mixed up dtslint/tslint.json and dtslint/dtslint.json.

DefinitelyTyped-tools/packages/dtslint/tslint.json

Line 2 in 924e506

"extends": "tslint:latest",

Never mind, apologies for the disruption .🙂

[jakebailey]

I failed to notice that these said minor. They should have been patch. We are 0.0.x without stability and now we just released partial 0.1.0s :(((((((((((((((

[JoshuaKGoldberg]

Oh geez. sorry!