This uses MP_REGISTER_ROOT_POINTER() to register mod_network_nic_list and
removes the same from all mpconfigport.h.
Signed-off-by: David Lechner <david@pybricks.com>
It's no longer needed because this macro is now processed after
preprocessing the source code via cpp (in the qstr extraction stage), which
means unused MP_REGISTER_MODULE's are filtered out by the preprocessor.
Signed-off-by: Damien George <damien@micropython.org>
