Hiervoor is nog een andere work-around die wel werkt totdat Adobe een goede 'delete swatches-functie' inbouwt.
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1. Create a new document.
2. In that document, create a process color but give it the same name as your spot color that you want to remove from the reluctant document.
3. Make a book consisting only of the two documents.
4. Use synchronization, choosing colors only (I've not done this so I'm hazy on the details).
5. Synchronize the colors.
6. Now you should be able to delete the color in the previously reluctant document.