wifi: iwlwifi: Remove unused iwl_bz_name

iwl_bz_name[] has been unused since the resent
commit 6795a371 ("wifi: iwlwifi: Print a specific device name.")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20241223013202.340180-6-linux@treblig.org