files: Unexport collect_task_fd()

It has only one user, so unexport it.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/files.c

@@ -124,7 +124,7 @@ struct fdinfo_list_entry *find_used_fd(struct pstree_item *task, int fd)
 	return NULL;
 }
 
-void collect_task_fd(struct fdinfo_list_entry *new_fle, struct rst_info *ri)
+static void collect_task_fd(struct fdinfo_list_entry *new_fle, struct rst_info *ri)
 {
 	struct fdinfo_list_entry *fle;
 

criu/include/files.h

@@ -111,7 +111,6 @@ struct file_desc_ops {
 };
 
 int collect_fd(int pid, FdinfoEntry *e, struct rst_info *rst_info, bool ghost);
-void collect_task_fd(struct fdinfo_list_entry *new_fle, struct rst_info *ri);
 struct fdinfo_list_entry *collect_fd_to(int pid, FdinfoEntry *e,
 		struct rst_info *rst_info, struct file_desc *fdesc, bool fake);