/usr/share/xen-tools/centos-4.d/99-clean-image is in xen-tools 4.6.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/xen-tools/centos-4.d/../common/99-clean-image-rpm
/usr/share/xen-tools/centos-4.d/../common/99-clean-image-rpm