Bump express and addons-linter

Removes [express](https://github.com/expressjs/express). It's no longer used after updating ancestor dependency [addons-linter](https://github.com/mozilla/addons-linter). These dependencies need to be updated together.


Removes `express`

Updates `addons-linter` from 3.23.0 to 5.24.0
- [Release notes](https://github.com/mozilla/addons-linter/releases)
- [Commits](https://github.com/mozilla/addons-linter/compare/3.23.0...5.24.0)

---
updated-dependencies:
- dependency-name: express
  dependency-type: indirect
- dependency-name: addons-linter
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -9,7 +9,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "addons-linter": "^3.23.0",
+    "addons-linter": "^5.24.0",
     "ajv": "^6.6.3",
     "chai": "^4.2.0",
     "eslint": "^7.32.0",