New review comment by loosefish-scapegrace on void-packages repository

https://github.com/void-linux/void-packages/pull/47018#discussion_r1382771738

Comment:
> That's even more of an argument against adding this capability. Some future release will drop it entirely and we'll be left with vestigial logic that only existed to support custom builds in the first place.

That's fair, I think. `xnotify` supports Xresources anyway, so I
think it's not as useful as for something like `dmenu`...