lib:util: Fix resourse leak CID#1412633

lib:util: Fix resourse leak CID#1412633

Stop using un-needed variable 'handle', this variable is not used
anywhere later.
Also load_module() internally allocates and uses handle, which suffice
for its operation.

This fixes resource leak issue reported by coverity #1412633

Signed-off-by: Vinit Agnihotri <vagnihot@redhat.com>
Reviewed-by: Anoop C S <anoopcs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Anoop C S <anoopcs@samba.org>
Autobuild-Date(master): Fri Aug 15 06:19:51 UTC 2025 on atb-devel-224