criu/include/util.h: rm unused macro

This macro is not in use since mid-2012 (commit 4806e139
"protobuf: Convert vma_entry to PB format v3"), so I guess
it is about time to retire it.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/include/util.h

@@ -40,7 +40,6 @@ struct list_head;
 extern void pr_vma(unsigned int loglevel, const struct vma_area *vma_area);
 
 #define pr_info_vma(vma_area)	pr_vma(LOG_INFO, vma_area)
-#define pr_msg_vma(vma_area)	pr_vma(LOG_MSG, vma_area)
 
 #define pr_vma_list(level, head)				\
 	do {							\