Remove check-requirements job from networking-nec
Remove check-requirements job from networking-nec

networking-nec is currently maintained based on product schedule,
so the maintenance team would like to update requirements files
manually rather than the automatic update.

The corresponding entry in requirements repository has been dropped
in the change Ie9469562045085fe13da63a92eadf09ee0998315.

Change-Id: I7fed5e7a2e65814f2e7709224e17655573200f28

openstack-infra/project-config,openstack-infra/project-config