docs: Changelog

Author: defnull

CHANGELOG.rst

@@ -10,18 +10,6 @@ changes, even if they technically change behavior from *incorrect* to *correct*
 and may break applications that rely on *incorrect* or *undefined* behavior or
 *undocumented* APIs.
 
-
-Release 1.4
-===========
-
-**Not released yet**
-
-* feat: More strict (and also faster) header validation within segments.
-* feat: :class:`PushMultipartParser` is now easier to sub-class to support
-  alternative multipart types (e.g. ``multipart/byterange``).
-* change: :attr:`MultipartSegment.name`` is now typed as optional, but is still
-  guaranteed to be a string for unmodified versions of the parser.
-
 Release 1.3
 ===========