I have a network with 2 zone directors. Some of the aps are managed by one of two zone directors, other aps are managed by the second zone director.
But, I have 4 aps who are managed by a zone director, status connected, but on the second zone director are showed as approval pending.
You can easily remove those AP in approval pending state. Take a look at the URL below, just select the AP's in approval pending state in the list & delete and you shall be good. Screenshot is just indicative.