def detach_volume(self, connection_info, instance, mountpoint,
                      encryption=None):
        """Detach the disk attached to the instance."""
        try:
            del self._mounts[instance.name][mountpoint]
        except __HOLE__:
            pass
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/virt/fake.py/FakeDriver.detach_volume