[Bug fortran/67588] module.c heap use after free

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67588

--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
I believe that

use_list = module_list;

at line module.c:805 is useless and can be expunged.