Remove unused dependencies

Author: Pelle Wessman

lib/utils/generate-types.js

@@ -64,9 +64,7 @@
     "installed-check": "^6.0.4",
     "mocha": "^10.0.0",
     "npm-run-all2": "^6.0.2",
-    "openapi-typescript": "^5.4.1",
     "type-coverage": "^2.21.2",
-    "type-fest": "^3.1.0",
     "typescript": "~4.6.0"
   },
   "dependencies": {