Update get_loggers()

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

This PR refactors logging in the YOLOv5 project to use a consistent logging pattern.

📊 Key Changes

• 🔄 Replaced direct print() statements with LOGGER calls for structured logging.
• 🧹 Removed explicit LOGGER definitions in individual files, referencing a common LOGGER instead.
• ✂️ Removed set_logging() calls, assuming logging is set centrally.
• 🚚 Moved the set_logging() function and LOGGER initialization into utils/general.py for shared use.

🎯 Purpose & Impact

• Unified Logging: Centralizes logging configuration, making it easier to manage and configure output across different files.
• Cleaner Codebase: Simplifies modules by removing duplicate logging setup, leading to a cleaner and more maintainable code structure.
• Enhanced Debugging: Structured logging provides consistency in debug output, which can be helpful when diagnosing issues.
• Non-functional Change: As a refactoring, this should not affect the end-user functionality of the tool, but developers will experience a more standardized logging approach.