Hmm... sizes can be taken from manuals, old MSDN pages or Wikipedia with some effort.
That's no reason to remove it from the driver. In fact, given how often URLs change, it is (if anything) an argument for
keeping it in the driver. We put useful info like that directly in the drivers for a very good reason, which is that MAME is a documentation project. Choosing to actively remove documentation seems to run against that.
I am forced to make a sacrifice for readability, as our driver approaches 100 kilobyte.
That means the driver should be split across multiple files, not that you should be removing useful documentation from it.