RDMA/cxgb4: Delete unused c4iw_ep_redirect prototype

c4iw_ep_redirect() doesn't exist.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Link: https://lore.kernel.org/r/a67881e7-469b-43d9-9973-ad7579eb2c4b@p183Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/cxgb4/iw_cxgb4.h

@@ -930,8 +930,6 @@ void c4iw_id_table_free(struct c4iw_id_table *alloc);
 
 typedef int (*c4iw_handler_func)(struct c4iw_dev *dev, struct sk_buff *skb);
 
-int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
-		     struct l2t_entry *l2t);
 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qpid,
 		   struct c4iw_dev_ucontext *uctx);
 u32 c4iw_get_resource(struct c4iw_id_table *id_table);