IB/rxe: avoid unnecessary export

The function rxe_remove_all is only used in this modules.
There is no other modules that call this function. So it
is not necessary to export it.
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/sw/rxe/rxe_net.c

@@ -623,7 +623,6 @@ void rxe_remove_all(void)
 	}
 	spin_unlock_bh(&dev_list_lock);
 }
-EXPORT_SYMBOL(rxe_remove_all);
 
 static void rxe_port_event(struct rxe_dev *rxe,
 			   enum ib_event_type event)