chore: remove eclint as it is no longer maintained

.lintstagedrc.js

@@ -1,6 +1,5 @@
 /* eslint-disable import/no-extraneous-dependencies */
 module.exports = {
-  '*': ['eclint fix', 'git add'],
   '*.js': ['eslint --fix', 'prettier --write', 'git add'],
   '*.md': [
     'prettier --write',

package.json

@@ -15,7 +15,6 @@
     "format:prettier": "prettier \"**/*.{js,md}\" \"packages/*/package.json\" \"package.json\" --write",
     "postinstall": "npm run custom-elements-manifest",
     "lint": "run-p lint:*",
-    "lint:eclint": "git ls-files | xargs eclint check",
     "lint:eslint": "eslint --ext .js,.html .",
     "lint:markdownlint": "git ls-files '*.md' | xargs markdownlint --ignore '{.github/**/*.md,.changeset/*.md,**/CHANGELOG.md}'",
     "lint:prettier": "prettier \"**/*.js\" --list-different || (echo '↑↑ these files are not prettier formatted ↑↑' && exit 1)",
@@ -68,7 +67,6 @@
     "chalk": "^4.1.0",
     "concurrently": "^5.2.0",
     "cross-env": "^7.0.2",
-    "eclint": "^2.1.0",
     "es6-promisify": "^6.1.1",
     "eslint": "^7.20.0",
     "eslint-config-prettier": "^8.0.0",