---
upgrade:
  - |
    The following ``nova::scheduler::filter`` class parameters have been
    removed.

    - ``scheduler_host_subset_size``
    - ``scheduler_available_filters``
    - ``scheduler_enabled_filters``
    - ``scheduler_weight_classes``

  - |
    The following parameters of the ``nova::scheduler::filter`` class no longer
    interpret empty value as the indicator of service defaults. In case
    an empty value is passed, nova-scheduler may be deployed without available
    or enabled scheduler filters.

    - ``available_filters``
    - ``enabled_filters``
