chore: remove CODEOWNERS

IMO, this is just confusing new contributors because they always see @Kubuxu
tagged for review but that doesn't actually mean anyone's going to review the
PR.

It _also_ means _I_ can't ask @Kubuxu to review the PR.

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

CODEOWNERS

-# Please see https://help.github.com/articles/about-codeowners/ for more information
-
-# Global owner
-*		@Kubuxu
-
-# Subsystem specific owners
-
-