fix: setup in Lightning Studio by uninstalling pre-installed lightning package (#21275)

* update

* update

---------

Co-authored-by: Bhimraj Yadav <bhimrajyadav977@gmail.com>
Co-authored-by: Nicki Skafte Detlefsen <skaftenicki@gmail.com>

Author: 3 people

Makefile

@@ -7,7 +7,11 @@ export SPHINX_MOCK_REQUIREMENTS=1
 # install only Lightning Trainer packages
 export PACKAGE_NAME=pytorch
 
+
+# In Lightning Studio, the `lightning` package comes pre-installed.
+# Uninstall it first to ensure the editable install works correctly.
 setup:
+	uv pip uninstall lightning pytorch-lightning lightning-fabric || true
 	uv pip install -r requirements.txt \
 	    -r requirements/pytorch/base.txt \
 	    -r requirements/pytorch/test.txt \