openvpn, remove check for mode in remote_network, remote_networkv6
openvpn, remove check for mode in remote_network, remote_networkv6

It doesn't seem to make sense to ask for a value and ignore it afterwards, there doesn't appear to be a valid reason to validate here.
For https://github.com/opnsense/core/issues/1932

opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core