route: drop unnecessary oo_clone() implementation from netconf
route: drop unnecessary oo_clone() implementation from netconf

If the object has no complex data (pointers!), then the base
implementation using memcpy() is enough. No need to implement
oo_clone().

thom311/libnl,greearb/libnl-ct,greearb/libnl-ct,thom311/libnl,thom311/libnl,greearb/libnl-ct