Removes the contacts with uids from the list uids from this.
This is always more efficient than calling remove_contact if you have more
than one uid to remove, as some backends can implement it as a batch request. The call is finished by
remove_contacts.end from the callback.
| this |
an BookClient |
| uids |
a SList of UIDs to remove |
| opflags |
bit-or of BookOperationFlags |
| cancellable |
a Cancellable; can be null |
| callback |
callback to call when a result is ready |
| user_data |
user data for the |