remove deprecated serial/bt logging options and unify in the new (#4516)

security option.  Per discussion in https://github.com/meshtastic/firmware/issues/4375
no need to preserve the old options when changing to this new simpler
single boolean because they were newish, rarely used and only for 'advanced'
developers.

src/mesh/NodeDB.cpp

@@ -127,7 +127,6 @@ NodeDB::NodeDB()
     if (!config.has_security) {
         config.has_security = true;
         config.security.serial_enabled = config.device.serial_enabled;
-        config.security.bluetooth_logging_enabled = config.bluetooth.device_logging_enabled;
         config.security.is_managed = config.device.is_managed;
     }
 #if !(MESHTASTIC_EXCLUDE_PKI)