Remove redundant comment

Remove redundant integer casting

Since all "ID" input are indeed already casted in the controller => https://github.com/pH-7/ProjectU-simple-clean-nodeJS-API/blob/d25a7aa0b75c90fe7225257e720a6d98534b5f83/src/controllers/user.controller.js#L41

Sync package-lock with `package.json`