Bluetooth: Remove unused rx_prio_queue

The rx_prio_queue k_fifo object has not been used for anything for a
really long time. The use for it was originally removed by the following
commit:

commit ad475d863ab84dfd4c0b2896d903f0140a0f713a
Author: Szymon Janc <ext.szymon.janc@tieto.com>
Date:   Fri Apr 22 11:36:04 2016 +0200

    Bluetooth: Remove RX priority fiber

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
1 file changed