[TASK] Make the deprecation of the IE hack complete

This is a followup to #993.

Author: oliverklee

CHANGELOG.md

@@ -17,7 +17,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Deprecated
 
-- Deprecate the IE hack in `Rule` (#993)
+- Deprecate the IE hack in `Rule` (#993, #1003)
 - `OutputFormat` properties for space around list separators as an array (#880)
 - Deprecate `OutputFormat::level()` (#870)
 

src/Rule/Rule.php

@@ -36,8 +36,6 @@ class Rule implements Renderable, Commentable
 
     /**
      * @var array<int, int>
-     *
-     * @deprecated since V8.8.0, will be removed in V9.0
      */
     private $aIeHack;
 
@@ -311,6 +309,8 @@ public function addValue($mValue, $sType = ' ')
      * @param int $iModifier
      *
      * @return void
+     *
+     * @deprecated since V8.8.0, will be removed in V9.0
      */
     public function addIeHack($iModifier)
     {