staging: greybus: audio_helper: remove unused and wrong debugfs usage
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.75 by commit 4dab0d27a4211a27135a6899d6c737e6e0759a11. For more details please see the references link.