Hi Sheldon,
[ I ]
You can try turning off/ Disable Port Fault Correlation first and see if that helps you to achieve what you are trying to do.
You can disable this by going to VNM Model -> Fault Isolation settings -> Port Fault Correlation -> Disabled.
[ II ]
You can also do this by destroying the Connects_to association between the two models respectively.
Destroy association [-n] rel=relation lmh=left_model_handle rmh=right_model_handle
for two models that are resolved to the port level of each, there are two Connects_to associations you have to remove. The one from the interface of device A to device B and the one from the interface of device B to device A. So you need to find the model handle of the interface and device models associated first. You also have an Is_Adjacent_to association from device A to B and from B to A.
To be frank, this will not be an easy task to accomplish if you having multiple connections to delete.
[ III ]
You can also right click on the link in the OneClick and selecting the delete menu.
Thanks & Regards
Vanshdeep