revert mac coreaudio thread priority

[sandboxcoder]

Description

• revert d85f89a (change I made). Apparently com.apple.audio.IOThread.client (audio thread) is already elevated so this change isn't going to assist users on macOS 26 experiencing choppy audio so its best to remove this code to avoid future merge conflicts when we pull
• This is the reconnect_thread which is only invoked when missing a device (coreaudio is trying to reconnect the device)

Motivation and Context

Misunderstood coreaudio, removing non-beneficial code

How Has This Been Tested?

Tested this change with Desktop.

Types of changes

• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the streamlabs branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.