eval_epoch no longer requires the phase argument

mu_map/training/lib.py

@@ -110,7 +110,7 @@ class AbstractTraining:
                 param.optimizer.step()
         return loss / len(data_loader)
 
-    def _eval_epoch(self, phase: str):
+    def _eval_epoch(self):
         torch.set_grad_enabled(False)
         for model in self.models:
             model.eval()