SimplePie: Deprecate set_item_limit method

This is no-op outside multi-feed mode, which has already been deprecated.

Author: jtojnar

CHANGELOG.md

@@ -7,8 +7,22 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/simplepie/simplepie/compare/1.9.0...master)
 
+### Added
+
 Nothing yet.
 
+### Changed
+
+Nothing yet.
+
+### Fixed
+
+Nothing yet.
+
+### Deprecated
+
+- `SimplePie\SimplePie::set_item_limit()` is deprecated since it only affects multi-feed mode, which has been deprecated in SimplePie 1.9 (by @jtojnar in [#954](https://github.com/simplepie/simplepie/pull/954))
+
 ## [1.9.0](https://github.com/simplepie/simplepie/compare/1.8.1...1.9.0) - 2025-09-12
 
 ### Added

src/SimplePie.php

@@ -1614,6 +1614,8 @@ public function set_image_handler($page = false, string $qs = 'i')
     /**
      * Set the limit for items returned per-feed with multifeeds
      *
+     * @deprecated since SimplePie 1.10.0, this does nothing outside multifeeds.
+     *
      * @param int $limit The maximum number of items to return.
      * @return void
      */