pfSense-Installer: Fix the issue when only the WAN settings are present.
During the configuration import, if only the WAN settings are present, removethe LAN settings from the configuration XML.
Ticket: #17854
pfSense-Installer: Fix the issue when only the WAN settings are present.
During the configuration import, if only the WAN settings are present, remove
the LAN settings from the configuration XML.
Ticket: #17854