merge-tree: lose unused "flags" from merge_list

Drop the unused field from the structure.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/merge-tree.c

@@ -12,8 +12,7 @@ struct merge_list {
 	struct merge_list *next;
 	struct merge_list *link;	/* other stages for this object */
 
-	unsigned int stage : 2,
-		     flags : 30;
+	unsigned int stage : 2;
 	unsigned int mode;
 	const char *path;
 	struct blob *blob;