lib: remove unused file fetch_module

PR-URL: nodejs#55880
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: Jacob Smith <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Chemi Atlow <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>