Refactor forward() method profiling

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Refactoring and cleanup of the YOLOv5 forward pass methods.

📊 Key Changes

• Removed commented out logger info lines that were not in use.
• forward_augment and forward_once methods have been renamed to _forward_augment and _forward_once to signify their intended private use.
• Extracted profiling code into separate method _profile_one_layer to clean up the forward and _forward_once methods.

🎯 Purpose & Impact

• 🧹 Cleaner Codebase: Removal of commented code and refactoring for a cleaner, more maintainable codebase.
• 🛡️ Clearer Method Access: Underscore prefix on method names signifies these methods are internal and helps prevent their unintended use from outside the class.
• 🔍 Better Profiling and Visualization: Separation of profiling responsibility into a dedicated method makes the codebase easier to understand and maintain, potentially aiding in performance optimization efforts.
• 📉 Potential Decrease in Mistakes: Separating profiling code reduces clutter, which can decrease the chance of accidental errors during future maintenance.