list: Drop unused __list_for_each

The macro __list_for_each is equivalent to list_for_each and it is not
used anywhere.
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>

include/common/list.h

@@ -216,9 +216,6 @@ static inline void list_splice_tail_init(struct list_head *list,
 #define list_for_each(pos, head)				\
 	for (pos = (head)->next; pos != (head); pos = pos->next)
 
-#define __list_for_each(pos, head)				\
-	for (pos = (head)->next; pos != (head); pos = pos->next)
-
 #define list_for_each_prev(pos, head)				\
 	for (pos = (head)->prev; pos != (head); pos = pos->prev)