This fixes a regression introduced by the fix for CVE-2017-2616.
See <https://github.com/shadow-maint/shadow/pull/72> for more information.
* gnu/packages/admin.scm (shadow): Update to 4.5.
[source]: Remove patches.
* gnu/packages/patches/shadow-4.4-su-snprintf-fix.patch,
gnu/packages/patches/shadow-CVE-2017-2616.patch: Delete files.
* gnu/local.mk (dist_patch_DATA): Remove them.