Am developing a plugin, which add new bulk operations: its made via PluginEnabledListener which make more or less something like this to register:
ComponentAccessor.getBulkOperationManager().addProgressAwareBulkOperation(BulkAssignOperation.NAME_KEY, BulkAssignOperation.class);
The question is: How to unregister/delete operation, when plugin is uninstalled/disabled. What to write in PluginDisabledListener?