net/vlan: remove unused #define HAVE_VLAN_GET_TAG

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/if_vlan.h

@@ -555,8 +555,6 @@ static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
 	}
 }
 
-#define HAVE_VLAN_GET_TAG
-
 /**
  * vlan_get_tag - get the VLAN ID from the skb
  * @skb: skbuff to query