Remove information about semantic versioning.

CodeSnip isn't actually semantically versioned because it declares no
API and major version numbers can be bumped when there are major changes
that are not necessarily breaking changes.

Author: delphidabbler

CHANGELOG.md

@@ -1,15 +1,11 @@
 # Changelog
 
-This is the change log for _DelphiDabbler CodeSnip_.
+This is the change log for _DelphiDabbler CodeSnip_. It begins with the first ever pre-release version of _CodeSnip_.
 
-All notable changes to this project are documented in this file.
-
-This change log begins with the first ever pre-release version of _CodeSnip_. Releases are listed in reverse version number order.
+Releases are listed in reverse version number order.
 
 > Note that _CodeSnip_ v4 was developed in parallel with v3 for a while. As a consequence some v3 releases have later release dates than early v4 releases.
 
-From v4.1.0 the version numbering has attempted to adhere to the principles of [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
-
 ## Release v4.21.0 of 16 December 2022
 
 * Updated to support [REML version 5](https://htmlpreview.github.io/?https://github.com/delphidabbler/codesnip/blob/version-4.21.0/Docs/Design/reml.html) in snippet description & extra information [issue #71]: