docs/news: remove stale notation

We no longer use this "also to appear" / "also appeared" notation, so
remove the whole notice about it.

Signed-off-by: Jeff Squyres <jeff@squyres.com>

Author: jsquyres

docs/news/index.rst

@@ -10,29 +10,6 @@ This file contains the main features as well as overviews of specific
 bug fixes (and other actions) for each version of Open MPI since
 version 1.0.
 
-.. error:: GP - move elsewhere and refer to software versioning here.
-
-    As more fully described in the "Software Version Number" section in
-    the README file, Open MPI typically releases two separate version
-    series simultaneously.  Since these series have different goals and
-    are semi-independent of each other, a single NEWS-worthy item may be
-    introduced into different series at different times.  For example,
-    feature F was introduced in the vA.B series at version vA.B.C, and was
-    later introduced into the vX.Y series at vX.Y.Z.
-
-    The first time feature F is released, the item will be listed in the
-    vA.B.C section, denoted as:
-
-       (** also to appear: X.Y.Z) -- indicating that this item is also
-                                     likely to be included in future release
-                                     version vX.Y.Z.
-
-    When vX.Y.Z is later released, the same NEWS-worthy item will also be
-    included in the vX.Y.Z section and be denoted as:
-
-       (** also appeared: A.B.C)  -- indicating that this item was previously
-                                     included in release version vA.B.C.
-
 :ref:`search`
 
 .. toctree::