Remove unlocked items which match the attributes from the secret service.
The attributes should be a set of key and value string pairs.
If this is null, then [funcService.get_sync] will be called to get the
default [classService] proxy.
This method may block indefinitely and should not be used in user interface threads.
| this |
the secret service |
| schema |
the schema for the attributes |
| attributes |
the attribute keys and values |
| cancellable |
optional cancellation object |
|
whether items were removed or not |