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))
+
+
 ## [1.9.0] - 2023-01-17
 
 ### Added

src/pytorch_lightning/lite/__init__.py

@@ -10,7 +10,6 @@
     from pytorch_lightning import LightningDataModule, LightningModule, Trainer
     from pytorch_lightning.accelerators.accelerator import Accelerator
     from pytorch_lightning.callbacks import Callback
-    from pytorch_lightning.lite import LightningLite
     from pytorch_lightning.loggers import Logger
     from pytorch_lightning.loops import Loop
     from pytorch_lightning.plugins import PrecisionPlugin
@@ -49,9 +48,6 @@ class BoringLoop(Loop):
     class BoringMetric(Metric):
         pass
 
-    class BoringLightningLite(LightningLite):
-        pass
-
     class BoringFabric(Fabric):
         pass
 

src/pytorch_lightning/lite/lite.py

@@ -52,7 +52,6 @@ def test_introspection_lightning_overrides():
         "Profiler",
         "Callback",
         "LightningDataModule",
-        "LightningLite",  # deprecated
         "Fabric",
         "Logger",
         "LightningModule",