修改一些小问题

yolov5/train.py

@@ -485,7 +485,7 @@ def train(hyp, opt, device, callbacks):
                     "ema": deepcopy(ema.ema).half(),
                     "updates": ema.updates,
                     "optimizer": optimizer.state_dict(),
-                    "opt": vars(opt),
+                    # "opt": vars(opt),
                     "git": GIT_INFO,  # {remote, branch, commit} if a git repo
                     "date": datetime.now().isoformat(),
                 }