The ability to delete individual ports on the Step 2 page of creating block schematic symbols would be helpful. The only current way I can see to do this is to go back a step and reduce the number of ports from a category, which just gets rid of the last ports created from that "type". The other workaround is to move the unwanted ports down to the bottom on the Step 2 page then go back to step 1 and reduce the number of ports.