No, do NOT delete that one
I don't have a 4.0x test environment available, so I'm not sure if/where 4.0x caches module information. Look in the root of your installation, check templates_c, or if you have a /var directory, check inside there.
Or, to keep things simpler, once you've installed the SEO module, go into the Administration -> Modules menu, Disable XC SEO, and then Enable XC SEO.
If there's any type of module cache, that step should reset the cache.