def removeListener(self, listener):
        self.listeners.remove(listener)
``BlockDeviceDeployer.calculate_changes`` recognizes a volume that is
dataset/ETHPy150Open pyjs/pyjs/pyjswaddons/FlowPlayer.py/Player.removeListener--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/BlockDeviceDeployerDetachCalculateChangesTests.test_detach_manifestation