mlxsw: Remove duplicate included header

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Elad Raz <eladr@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core.c

@@ -48,7 +48,6 @@
 #include <linux/skbuff.h>
 #include <linux/etherdevice.h>
 #include <linux/types.h>
-#include <linux/wait.h>
 #include <linux/string.h>
 #include <linux/gfp.h>
 #include <linux/random.h>