Bluetooth: Remove enable_hs declaration

This seems to be a left-over. The module parameter enable_hs has
been removed, but its extern declaration is still present. It is
not needed anymore, so just remove it.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index c8bc7bf..77a971a 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1787,6 +1787,4 @@
 };
 #define IREQ_CACHE_FLUSH 0x0001
 
-extern bool enable_hs;
-
 #endif /* __HCI_H */