Removes resources from the event.

    *resources* can be a list of email addresses or :class:`ExchangeEventAttendee` objects.

def remove_resources(self, resources):
    """
    Removes resources from the event.

    *resources* can be a list of email addresses or :class:`ExchangeEventAttendee` objects.
    """

    resources_to_delete = self._build_resource_dictionary(resources)
    for email in resources_to_delete.keys():
      if email in self._resources:
        del self._resources[email]

    self._dirty_attributes.add(u'resources')