deps: delete unused eslint deps (ethereum-optimism#11170)

Every dependency is a liability. We should strive to remove every
dependency that isn't critical. The JS stuff in the monorepo is
deprecated at this point but we still carry around a ton of deps
that should be removed asap from the repo.

This commit removes some unused eslint plugins, one small step towards
removing deps that are not necessary.

.eslintrc.js

@@ -15,10 +15,8 @@ module.exports = {
   },
   plugins: [
     'eslint-plugin-import',
-    'eslint-plugin-unicorn',
     'eslint-plugin-jsdoc',
     'eslint-plugin-prefer-arrow',
-    'eslint-plugin-react',
     '@typescript-eslint',
   ],
   overrides: [

package.json

@@ -59,12 +59,8 @@
     "eslint-config-standard": "^16.0.3",
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-jsdoc": "^48.0.6",
-    "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prefer-arrow": "^1.2.3",
     "eslint-plugin-prettier": "^4.0.0",
-    "eslint-plugin-promise": "^5.1.0",
-    "eslint-plugin-react": "^7.24.0",
-    "eslint-plugin-unicorn": "^50.0.1",
     "mocha": "^10.6.0",
     "nx": "18.2.2",
     "nx-cloud": "latest",