Optimize imports

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Streamlining imports and dependencies in the YOLOv5 codebase.

📊 Key Changes

• Removed unused import torch.nn.functional from segment/train.py.
• Adjusted whitespace in utils/loggers/clearml/clearml_utils.py for better readability.
• Removed the parse_opt import from utils/loggers/comet/hpo.py file as it is no longer needed.

🎯 Purpose & Impact

• 🧹 Codebase Cleanup: Removing unnecessary imports declutters the code, making it easier to maintain and understand, which can potentially reduce bugs.
• 📖 Improved Readability: Minor spacing adjustments contribute to a more standardized code style.
• 🚀 Optimized Dependencies: By ensuring only necessary modules are imported, the app can run more efficiently, possibly reducing memory usage and startup time.