Before you can delete a subscription, you must first:
Suspend the replicate database connection
Delete all of the replicate articles in the subscription
For more information, see:
To delete an ASE Replicator subscription:
Select the primary Adaptive Server in the left pane.
Open the ASE Replicator folder under the primary Adaptive Server container.
Select a replicate connection in the ASE Replicator folder.
In the right pane, right-click the icon of the subscription you want to delete.
Select Delete.
Click Yes in the Question dialog box.