remove _run_val_every_n_steps

Author: DNXie

apps/sft/main.py

@@ -62,7 +62,6 @@ def __init__(self, job_config: ForgeJobConfig):
         self.current_step = 0
         self.num_training_steps = job_config.training.steps
         self.gradient_accumulation_steps = 1  # Example value, adjust as needed
-        self._run_val_every_n_steps = job_config.get("run_val_every_n_steps", None)
         super().__init__(job_config)
         self.metric_logger = None  # TODO: fix this