iwlwifi: mvm: Remove testing of static PIC in PhyDB

The PIC was supposed to be a small signature appended to the
PhyDB data, but the signature isn't really static and thus
attempting to check it just causes the warnings spuriously
so remove them.

Signed-off-by: Dor Shaish <dor.shaish@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>