[!!!][TASK] Remove TODAYS_SPECIAL error constant

The constant `TODAYS_SPECIAL` has never been used in TYPO3
core and also 3rd party extensions in TER do not make
use of it. The constant can therefore be removed safely
from the class.

Resolves: #98195
Releases: main
Change-Id: I187817b2641d97c48832e757ad0de710e49ce31f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75538


Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/core/Classes/SysLog/Error.php

@@ -27,12 +27,4 @@ class Error
     public const SYSTEM_ERROR = 2;
     public const SECURITY_NOTICE = 3;
     public const WARNING = 4;
-
-    /*
-     * 100 is a code, which has been introduced by Kasper in his "Todays special" commit:
-     * @see https://github.com/typo3/typo3/commit/7496d6d033
-     *
-     * @todo The constant should either be renamed or replaced completely in the future
-     */
-    public const TODAYS_SPECIAL = 100;
 }

typo3/sysext/core/Documentation/Changelog/12.0/Breaking-98195-RemoveTODAYS_SPECIALErrorConstant.rst

+.. include:: /Includes.rst.txt
+
+.. _breaking-98195-1661274247:
+
+=======================================================
+Breaking: #98195 - Remove TODAYS_SPECIAL error constant
+=======================================================
+
+See :issue:`98195`
+
+Description
+===========
+
+The constant :php:`TODAYS_SPECIAL` in :php:`\TYPO3\CMS\Core\SysLog\Error` has never been
+used in TYPO3 core and is therefore removed without replacement.
+
+
+Impact
+======
+
+3rd party extensions using the extension will fail with a PHP error.
+
+
+Affected installations
+======================
+
+3rd party extensions who use the :php:`TODAYS_SPECIAL` constant.
+
+
+Migration
+=========
+
+3rd party extensions using the :php:`TODAYS_SPECIAL` constant should replace
+all usages with the integer value `100` or use a custom class with a user
+defined constant.
+
+.. index:: Backend, PHP-API, NotScanned, ext:core