Why do we need a run() method

[aazzolini]

Discussed in #10206

^{Originally posted by aazzolini October 27, 2021}
It looks completely out of place to me and misleading. I really like the simplicitly of LightningLite as a concrete class.
The run method here is completely out of place. The docstring is wrong, because nothing gets accelerated because it is inside the "run" function, no other places call the "run" method.

I believe it would be great if we could remove the "run" method from here and make LightingLite a concrete class.

https://github.com/PyTorchLightning/pytorch-lightning/blob/c614cf0c3d7a252bfd01ff8516f9f42f1c1b055a/pytorch_lightning/lite/lite.py#L143

[tchaton]

Dear @aazzolini,

This shouldn't be an issue. You are sending a mixed signal to the contributors. Let's move this directly on the PR review.

Closing for now.
Best,
T.C