Remove check_requirements('flatbuffers==1.12')

[glenn-jocher]

Legacy constraint, no longer required.

Signed-off-by: Glenn Jocher glenn.jocher@ultralytics.com

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced TensorFlow export compatibility in YOLOv5.

📊 Key Changes

• 🛠 Removed version check for flatbuffers before importing TensorFlow.
• 🧹 Cleaned up TensorFlow export conditions to ensure clearer logic and prevent simultaneous export of TFLite and TF.js formats.

🎯 Purpose & Impact

• ✔️ Improves the smoothness and reliability of exporting models to TensorFlow formats.
• 🚀 Enables users to export their models to their desired format without encountering version-related import errors that previously existed due to the flatbuffers dependency.
• 🔍 Ensures users can confidently export models by enforcing separate export paths for TFLite and TF.js, preventing confusion and potential errors.