<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def remove(self, label):
 """Remove a label. Args: label (gkeepapi.node.Label):
 The Label object. """

        if label.id in self._labels:
            self._labels[label.id] = None
        self._dirty = True