refactor: remove deprecated BaseHandler::RESERVED_CHARACTERS constant

Author: paulbalandan

system/Cache/Handlers/BaseHandler.php

@@ -25,17 +25,6 @@
  */
 abstract class BaseHandler implements CacheInterface
 {
-    /**
-     * Reserved characters that cannot be used in a key or tag. May be overridden by the config.
-     * From https://github.com/symfony/cache-contracts/blob/c0446463729b89dd4fa62e9aeecc80287323615d/ItemInterface.php#L43
-     *
-     * @deprecated in favor of the Cache config
-     */
-    public const RESERVED_CHARACTERS = '{}()/\@:';
-
-    /**
-     * Maximum key length.
-     */
     public const MAX_KEY_LENGTH = PHP_INT_MAX;
 
     /**

user_guide_src/source/changelogs/v4.8.0.rst

@@ -54,11 +54,12 @@ Removed Deprecated Items
     - ``CodeIgniter\Autoloader\Autoloader::sanitizeFileName()``
     - ``CodeIgniter\Autoloader\Autoloader::discoverComposerNamespaces()``
 - **Bootstrap:** The deprecated **system/bootstrap.php** file has been removed.
-- **Cache:** Removed the following methods deprecated since v4.6.0:
-    - ``CodeIgniter\Cache\Handlers\FileHandler::writeFile()``
-    - ``CodeIgniter\Cache\Handlers\FileHandler::deleteFile()``
-    - ``CodeIgniter\Cache\Handlers\FileHandler::getDirFileInfo()``
-    - ``CodeIgniter\Cache\Handlers\FileHandler::getFileInfo()``
+- **Cache:** Removed the following deprecated methods and constant:
+    - ``CodeIgniter\Cache\Handlers\BaseHandler::RESERVED_CHARACTERS`` (deprecated since v4.1.5)
+    - ``CodeIgniter\Cache\Handlers\FileHandler::writeFile()`` (deprecated since v4.6.0)
+    - ``CodeIgniter\Cache\Handlers\FileHandler::deleteFile()`` (deprecated since v4.6.0)
+    - ``CodeIgniter\Cache\Handlers\FileHandler::getDirFileInfo()`` (deprecated since v4.6.0)
+    - ``CodeIgniter\Cache\Handlers\FileHandler::getFileInfo()`` (deprecated since v4.6.0)
 - **CLI:** Removed the following properties and methods deprecated:
     - ``CodeIgniter\CLI\BaseCommand::getPad()``
     - ``CodeIgniter\CLI\CLI::$readline_support``