#479 attempt better cache control for device ports

lib/App/Netdisco/Worker/Plugin/Discover/Properties.pm

@@ -252,10 +252,6 @@ register_worker({ phase => 'early', driver => 'snmp' }, sub {
     $device->update_or_insert(undef, {for => 'update'});
     $device->ports->populate([values %interfaces]);
 
-    # cache for later phases of the discovery
-    vars->{'device_ports'} =
-      { map {($_->port => $_)} $device->ports->all };
-
     return Status->info(sprintf ' [%s] interfaces - added %d new interfaces',
       $device->ip, scalar values %interfaces);
   });