remove unnecessary cast for map_library return

the function already returns (void *)

ldso/dynlink.c

@@ -1831,7 +1831,7 @@ void __dls3(size_t *sp, size_t *auxv)
 			dprintf(2, "%s: cannot load %s: %s\n", ldname, argv[0], strerror(errno));
 			_exit(1);
 		}
-		Ehdr *ehdr = (void *)map_library(fd, &app);
+		Ehdr *ehdr = map_library(fd, &app);
 		if (!ehdr) {
 			dprintf(2, "%s: %s: Not a valid dynamic program\n", ldname, argv[0]);
 			_exit(1);