Deflowify wonder-stuff (#1001)

## Summary:
We're finished the TypeScript migration so we no longer need Flow related stuff kicking around.

Issue: None

## Test plan:
- yarn test
- cd packages/eslint-plugin-khan
- yarn test

Author: kevinbarabash

Reviewers: jeresig, somewhatabstract

Required Reviewers:

Approved By: jeresig, somewhatabstract

Checks: ✅ codecov/project, ✅ Test (macos-latest, 20.x), ✅ CodeQL, ✅ Lint, typecheck, and coverage check (ubuntu-latest, 20.x), ✅ Prime node_modules cache for primary configuration (ubuntu-latest, 20.x), ✅ gerald, ⏭️  dependabot, ✅ Analyze (javascript)

Pull Request URL: #1001

.changeset/calm-boxes-exist.md

@@ -0,0 +1,5 @@
+---
+"@khanacademy/eslint-plugin": major
+---
+
+Remove Flow related rules

.changeset/light-apes-matter.md

@@ -0,0 +1,8 @@
+---
+"@khanacademy/wonder-stuff-render-environment-jsdom": patch
+"@khanacademy/wonder-stuff-render-server": patch
+"@khanacademy/wonder-stuff-server": patch
+"@khanacademy/wonder-stuff-core": patch
+---
+
+Update comments to no longer reference Flow

.codecov.yml

@@ -5,7 +5,7 @@ coverage:
 
   status:
     project:
-      default: on
+      default: true
     patch:
       default: off
     changes:
@@ -14,14 +14,13 @@ coverage:
 comment:
   layout: "header, reach, diff, flags, files, footer"
   behavior: default
-  require_changes: no
-  require_base: no
-  require_head: yes
+  require_changes: false
+  require_base: false
+  require_head: true
 
 ignore:
   - "build-settings/*.js"
   - "utils/*.js"
   - "packages/**/dist/index.js"
   - "packages/**/types/**/*.ts"
   - "packages/**/examples/**/*.ts"
-  - "packages/**/*.flowtest.js"

CONTRIBUTING.md

@@ -44,11 +44,11 @@ We love code reviews. If there are open pull requests, please feel free to revie
 
 #### Automated
 
-To ensure code quality, we use prettier, flow, eslint, and jest. These are all executed automatically on commit, so don't worry if you forget to run them before you commit. They are also executed when you submit, edit, or push to a pull request to ensure the contribution meets our code quality standard.
+To ensure code quality, we use prettier, TypeScript, eslint, and jest. These are all executed automatically on commit, so don't worry if you forget to run them before you commit. They are also executed when you submit, edit, or push to a pull request to ensure the contribution meets our code quality standard.
 
 To execute these operations outside of a pull request or commit operation, you can use `yarn`.
 
-- `yarn flow`
+- `yarn typecheck`
 - `yarn lint`
 - `yarn test`
 

packages/eslint-plugin-khan/README.md

@@ -6,11 +6,6 @@ eslint plugin with our set of custom rules for various things
 
 ## Rules
 
-- [khan/flow-array-type-style](docs/flow-array-type-style.md)
-- [khan/flow-exact-props](docs/flow-exact-props.md)
-- [khan/flow-exact-state](docs/flow-exact-state.md)
-- [khan/flow-no-one-tuple](docs/flow-no-one-tuple.md)
-- [khan/imports-requiring-flow](docs/imports-requiring-flow.md)
 - [khan/jest-async-use-real-timers](docs/jest-async-use-real-timers.md)
 - [khan/jest-enzyme-matchers](docs/jest-enzyme-matchers.md)
 - [khan/react-no-method-jsx-attribute](docs/react-no-method-jsx-attribute.md)

packages/eslint-plugin-khan/babel.config.js

@@ -2,7 +2,6 @@
 // NOTE(kevinb): This should only be used by eslint-plugin-khan
 module.exports = {
     presets: [
-        "@babel/preset-flow",
         [
             "@babel/preset-env",
             {

packages/eslint-plugin-khan/package.json

@@ -20,7 +20,6 @@
   "devDependencies": {
     "@babel/eslint-parser": "^7.22.15",
     "@babel/preset-env": "^7.23.2",
-    "@babel/preset-flow": "^7.22.15",
     "@babel/preset-react": "^7.22.15",
     "@swc-node/register": "^1.6.8",
     "@swc/core": "^1.3.93",