* Drop the legacy engine copies from misc/
Nothing has loaded misc/*.func since ct/, install/, vm/ and tools/ moved to
community-scripts/core. misc/api.func stays until vm/owncloud-vm.sh gets its
DevScripts rewrite.
misc/images/ moves to .github/assets/. The tombstone stub for removed scripts
sourced misc/build.func and called variables(), which core's PVE engine does
not define; it now sources core.func.
* Drop misc/api.func
vm/owncloud-vm.sh was its last caller; DevScripts holds that script's rewrite
onto core/pve/vm-core.func. Merge this after the promotion.
CanbiZ (MickLesk)