Remove unused variable

Should have been removed in
2111507a57 ("Don't show OS version after
the bundles"), but escaped.

src/clr_bundle_ls.c

@@ -178,7 +178,6 @@ err:
 
 int bundle_list_main(int argc, char **argv)
 {
-	int current_version;
 	int lock_fd;
 	int ret;