fix mistake

Author: SkafteNicki

src/lightning/pytorch/CHANGELOG.md

@@ -49,9 +49,6 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed preventing recursive symlink creation iwhen `save_last='link'` and `save_top_k=-1` ([#21186](https://github.com/Lightning-AI/pytorch-lightning/pull/21186))
 
 
-- Fixed bug that prevented `BackboneFinetuning` from being used together with `LearningRateFinder` ([#21224](https://github.com/Lightning-AI/pytorch-lightning/pull/21224))
-
-
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 ## [2.5.5] - 2025-09-05