net: remove unused skb->do_not_encrypt

mac80211 required this due to the master netdev, but now
it can put all information into skb->cb and this can go.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index f2c69a2..df7b23a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -304,7 +304,6 @@
  *	@tc_index: Traffic control index
  *	@tc_verd: traffic control verdict
  *	@ndisc_nodetype: router type (from link layer)
- *	@do_not_encrypt: set to prevent encryption of this frame
  *	@dma_cookie: a cookie to one of several possible DMA operations
  *		done by skb DMA functions
  *	@secmark: security marking
@@ -380,12 +379,9 @@
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
 	__u8			ndisc_nodetype:2;
 #endif
-#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
-	__u8			do_not_encrypt:1;
-#endif
 	kmemcheck_bitfield_end(flags2);
 
-	/* 0/13/14 bit hole */
+	/* 0/14 bit hole */
 
 #ifdef CONFIG_NET_DMA
 	dma_cookie_t		dma_cookie;