You can uninstall or removes an installed ipxe-qemu package itself from Ubuntu 16.10 (Yakkety Yak) through the terminal,
$ sudo apt-get remove ipxe-qemu
If you would like to remove ipxe-qemu and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove ipxe-qemu
If you use with purge options to ipxe-qemu package all the configuration and dependent packages will be removed.
$ sudo apt-get purge ipxe-qemu
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove ipxe-qemu