.github: Drop sys-cluster/ipvsadm from automation

Author: krnowak

.github/workflows/portage-stable-packages-list

@@ -458,8 +458,6 @@ sys-block/thin-provisioning-tools
 sys-boot/efibootmgr
 sys-boot/gnu-efi
 
-sys-cluster/ipvsadm
-
 sys-devel/autoconf
 sys-devel/autoconf-archive
 sys-devel/autoconf-wrapper