Removes labels with given names from a given client object.

def RemoveClientLabels(self, client, labels_names):
    """Removes labels with given names from a given client object."""

    affected_owners = set()
    for label in client.GetLabels():
      if label.name in labels_names and label.owner != "GRR":
        affected_owners.add(label.owner)

    for owner in affected_owners:
      client.RemoveLabels(labels_names, owner=owner)