net: remove NETDEV_TX_LOCKED support

No more users in the tree, remove NETDEV_TX_LOCKED support.
Adds another hole in softnet_stats struct, but better than keeping
the unused collision counter around.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/net-procfs.c b/net/core/net-procfs.c
index 2bf8329..14d0934 100644
--- a/net/core/net-procfs.c
+++ b/net/core/net-procfs.c
@@ -162,7 +162,8 @@
 		   "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
 		   sd->processed, sd->dropped, sd->time_squeeze, 0,
 		   0, 0, 0, 0, /* was fastroute */
-		   sd->cpu_collision, sd->received_rps, flow_limit_count);
+		   0,	/* was cpu_collision */
+		   sd->received_rps, flow_limit_count);
 	return 0;
 }