remove unused typedoc package

Author: rosahbruno

glean/package-lock.json

@@ -117,7 +117,6 @@
     "ts-loader": "^9.0.1",
     "ts-mocha": "^10.0.0",
     "ts-node": "^10.8.0",
-    "typedoc": "^0.25.1",
     "typescript": "^4.3.5",
     "web-ext-types": "^3.2.1",
     "webpack": "^5.42.1",