Remove unnecessary TODO comment in fit_loop.py

The TODO suggested moving max_steps check inside training loop, but this is
correctly placed in fit_loop since global_step tracks steps across epochs
and the fit_loop is responsible for deciding when to stop the entire fit
process. Moving it would require additional flag variables, making the code
more complex without any benefit.

Co-authored-by: Borda <[email protected]>

Author: Copilot

src/lightning/pytorch/loops/fit_loop.py

@@ -176,7 +176,6 @@ def done(self) -> bool:
             rank_zero_info("`Trainer.fit` stopped: No training batches.")
             return True
 
-        # TODO: Move track steps inside training loop and move part of these condition inside training loop
         stop_steps = _is_max_limit_reached(self.epoch_loop.global_step, self.max_steps)
         if stop_steps:
             rank_zero_info(f"`Trainer.fit` stopped: `max_steps={self.max_steps!r}` reached.")