chore: remove unused @types/yargs-parser

Author: NiKrause

package.json

@@ -39,7 +39,6 @@
     "docs:no-publish": "aegir docs --publish false -- --exclude interop --exclude doc"
   },
   "devDependencies": {
-    "@types/yargs-parser": "^21.0.3",
     "aegir": "^47.0.22",
     "npm-run-all": "^4.1.5"
   },