old firmware of iwm(4)

[Li-Wen Hsu]

Hi -wireless@,

While looking at codes of iwm(4), I found that there are multiple
versions of firmware in the source tree, and it seems to me that some
of them are not used anymore.
Following is the list of old firmware of iwm(4), some of them are just
empty files, I guess it was just an accident while updating firmware
files.

iwm-3160-16.fw.uu
iwm-3160-9.fw.uu
iwm-7260-16.fw.uu
iwm-7260-9.fw.uu
iwm-7265-16.fw.uu
iwm-7265-9.fw.uu
iwm-7265D-17.fw.uu
iwm-8000C-16.fw.uu
iwm-8000C-17.fw.uu

I feel it might not be necessary to open a review at
reviews.freebsd.org sine the diff is 12MB and the only thing it does
is just delete these binary blob files.

Anyway, I put my diff here:
https://gist.githubusercontent.com/lwhsu/e702c9a65a3650d34daa16e8d4f1df5d/raw/aafd3a1d19cb7f34cfce7b5f572028c5bf460d47/remove-old-iwm-fw.diff

Any concerns if I remove these files?

Thanks,
Li-Wen