backend-*-api: remove unused express dependencies

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/backend-app-api/package.json

@@ -62,8 +62,6 @@
     "compression": "^1.7.4",
     "cookie": "^0.7.0",
     "cors": "^2.8.5",
-    "express": "^4.17.1",
-    "express-promise-router": "^4.1.0",
     "helmet": "^6.0.0",
     "jose": "^5.0.0",
     "knex": "^3.0.0",