iwlwifi: remove radio_config from eeprom_data

No one uses it.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Reviewed-by: Amit Beka <amit.beka@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>