Remove Airbnb ESLint config

We don't use it.

Author: JamieB-gu

dotcom-rendering/package.json

@@ -106,8 +106,6 @@
 		"dompurify": "3.2.4",
 		"dynamic-import-polyfill": "0.1.1",
 		"eslint": "8.57.1",
-		"eslint-config-airbnb-base": "15.0.0",
-		"eslint-config-airbnb-typescript": "17.0.0",
 		"eslint-plugin-custom-elements": "0.0.8",
 		"eslint-plugin-jsx-a11y": "6.7.1",
 		"eslint-plugin-jsx-expressions": "1.3.1",