skbuff: cleanup double word in comment

Remove the second 'to'.

Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/skbuff.c

@@ -681,7 +681,7 @@ exit:
 	 * while trying to recycle fragments on __skb_frag_unref() we need
 	 * to make one SKB responsible for triggering the recycle path.
 	 * So disable the recycling bit if an SKB is cloned and we have
-	 * additional references to to the fragmented part of the SKB.
+	 * additional references to the fragmented part of the SKB.
 	 * Eventually the last SKB will have the recycling bit set and it's
 	 * dataref set to 0, which will trigger the recycling
 	 */