As another user said- "It's barely 5 megabytes.. and it's probably not connecting to anything.
The protections for pre-installed apps help to make sure nothing else tampers with them, e.g. injecting some malware, but I'm sure you can remove those protections and reclaim the 5 MB if you really wanted to."
Chess was given as an example because it is the most ridiculous thing that can't be removed. See https://news.ycombinator.com/item?id=19809880 for my full response to the other user.
The protections for pre-installed apps help to make sure nothing else tampers with them, e.g. injecting some malware, but I'm sure you can remove those protections and reclaim the 5 MB if you really wanted to."
[1] https://news.ycombinator.com/item?id=19803067