net: remove rcu_dereference_bh_rtnl()

This helper is no longer used in the tree.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

include/linux/rtnetlink.h

@@ -61,16 +61,6 @@ static inline bool lockdep_rtnl_is_held(void)
 #define rcu_dereference_rtnl(p)					\
 	rcu_dereference_check(p, lockdep_rtnl_is_held())
 
-/**
- * rcu_dereference_bh_rtnl - rcu_dereference_bh with debug checking
- * @p: The pointer to read, prior to dereference
- *
- * Do an rcu_dereference_bh(p), but check caller either holds rcu_read_lock_bh()
- * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference_bh()
- */
-#define rcu_dereference_bh_rtnl(p)				\
-	rcu_dereference_bh_check(p, lockdep_rtnl_is_held())
-
 /**
  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
  * @p: The pointer to read, prior to dereferencing