Bluetooth: Remove BT_HS

High Speed, Alternate MAC and PHY (AMP) extension, has been removed from
Bluetooth Core specification on 5.3:

https://www.bluetooth.com/blog/new-core-specification-v5-3-feature-enhancements/

Fixes: 244bc377

 ("Bluetooth: Add BT_HS config option")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>