Lite: Remove legacy code (#15953)

Author: carmocca

src/pytorch_lightning/CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 
+## [fabricLaunchPLVersion] - 202Y-MM-DD
+
+### Removed
+
+- Removed the `pytorch_lightning.lite` module in favor of `lightning_fabric` ([#15953](https://github.com/Lightning-AI/lightning/pull/15953))
+
+
 ## [unreleased] - 202Y-MM-DD
 
 ### Added