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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def remove_all_nexusport_bindings():
 """Removes all nexusport bindings."""


    LOG.debug("remove_all_nexusport_bindings() called")
    session = bc.get_writer_session()
    session.query(nexus_models_v2.NexusPortBinding).delete()
    session.flush()