Revert "Bluetooth: DUN: Add framework changes to support DUN"

This reverts commit 76c7d2bad0bead6ca658c43dda114f6e19d7e613.
Revert "Bluetooth: Add Get/Set socket option to the Bluetooth Socket"

This reverts commit 9531fc2e52d951686813ef08fa4bc7c1210cb888.
fix previous cherry pick