kdat: remove cr-exec shambles

As cr-exec is deprecated-removed, drop ruins.
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/include/crtools.h

@@ -20,7 +20,6 @@ extern int cr_pre_dump_tasks(pid_t pid);
 extern int cr_restore_tasks(void);
 extern int convert_to_elf(char *elf_path, int fd_core);
 extern int cr_check(void);
-extern int cr_exec(int pid, char **opts);
 extern int cr_dedup(void);
 
 extern int check_add_feature(char *arg);

criu/include/kerndat.h

@@ -12,7 +12,6 @@ struct stat;
 
 extern int kerndat_init(void);
 extern int kerndat_init_rst(void);
-extern int kerndat_init_cr_exec(void);
 extern int kerndat_get_dirty_track(void);
 extern int kerndat_fdinfo_has_lock(void);
 extern int kerndat_loginuid(bool only_dump);

criu/kerndat.c

@@ -632,14 +632,3 @@ int kerndat_init_rst(void)
 
 	return ret;
 }
-
-int kerndat_init_cr_exec(void)
-{
-	int ret;
-
-	ret = get_task_size();
-	if (!ret)
-		ret = kerndat_compat_restore();
-
-	return ret;
-}