iwlwifi: mvm: remove left-over non-functional email alias

This email alias (ilw@linux.intel.com) hasn't been functional
for probably closer to a decade than not, remove it. It's not
really clear to me how this ended up in new code though.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>