update for 8.6.0-rc1 release [build_translations]

Author: jmckenna

en/include/announcements.inc

@@ -29,20 +29,6 @@ major changes for this release can be found in the :ref:`8.4 announcement <annou
 See the :ref:`changelog <changelog-8-4>`
 for the full list of changes and head to :ref:`download` to obtain a copy.
 
-**2025-01-08 - MapServer 8.4.0-rc1 is released**
-
-The first release candidate for MapServer 8.4.0 has been released. The list of
-major changes for this release can be found in the :ref:`8.4 announcement <announce-8-4>`.
-See the :ref:`changelog <changelog-8-4-0-rc1>`
-for the full list of changes and head to :ref:`download` to obtain a copy.
-
-**2024-12-14 - MapServer 8.4.0-beta2 is released**
-
-The second beta for MapServer 8.4 has been released. The list of
-major changes for this release can be found in the :ref:`8.4 announcement <announce-8-4>`.
-See the :ref:`changelog <changelog-8-4-0-beta2>`
-for the full list of changes and head to :ref:`download` to obtain a copy.
-
 **2024-09-02 - MapServer 8.2.2 is released**
 
 The maintenance release of MapServer 8.2.2 is now available.