Remove duplicate macros.h

[rlewkowicz]

Just a simple little duplicate to be removed.

[wang-xinyu]

@rlewkowicz We recently added the pre-commit check, can you please follow https://github.com/wang-xinyu/tensorrtx/blob/master/tutorials/contribution.md to run pre-commit on this changed file?

pre-commit run --files yolov9/plugin/yololayer.h

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.