Due to some experiments with NSX-T 3.0 in my lab with ESXi 7.0 hosts I was in need removing the VIB files manually from the host, as the NSX Manager failed doing so.
Just to be very clear: This is NOT officially supported by VMware! Do that at your own risk. If unsure, reach out to the support first.
Should you ever be in similar situation, here a few takeaways and lessons learned so far: