Remove a Ruleset From a Selected FTD device

There are two ways of removing a Ruleset from a selected FTD device, but their behaviors are slightly different.

Delete a Ruleset from a selected FTD device: This feature deletes a Ruleset and its associated shared rules from a selected FTD device.
Disassociate a Ruleset from a selected FTD device: This feature doesn’t remove the shared rules. Instead, it converts the shared rules to local rules.