Drop LIST_HEAD where the variable it declares is never used.
The uses were removed in 
244cd96adb5f ("net_sched: remove
list_head from tc_action"), but not the declaration.
The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier x;
@@
- LIST_HEAD(x);
  ... when != x
// </smpl>
Fixes: 244cd96adb5f ("net_sched: remove list_head from tc_action")
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
 
        struct mlxsw_sp_port_mall_tc_entry *mall_tc_entry;
        __be16 protocol = f->common.protocol;
        const struct tc_action *a;
-       LIST_HEAD(actions);
        int err;
 
        if (!tcf_exts_has_one_action(f->exts)) {