refactor(deps): comment out unused code

[BlackHole1]

http://fresh-center.net/linux/misc/zstd-1.5.2.tar.gz has been invalid.

[anjannath]

zstd is not used by the build script, all the dependencies that are built can be found here:

podman-machine-qemu/build-qemu.sh

Lines 23 to 43 in 0dee726

	function build_qemu_deps() {
	build_lib_gettext "$1"
	build_lib_libffi "$1"
	build_lib_pcre2 "$1"
	# glib should always follow the above dependencies (order matters)
	build_lib_glib "$1"
	build_lib_gmp "$1"
	build_lib_gpgerror "$1"
	build_lib_gcrypt "$1"
	build_lib_nettle "$1"
	build_lib_libpng "$1"
	build_lib_jpeg "$1"
	build_lib_pixman "$1"
	build_lib_libslirp "$1"
	build_lib_libusb "$1"
	build_lib_lzo "$1"
	build_lib_snappy "$1"
	build_lib_vde2 "$1"
	}

[BlackHole1]

@anjannath I re-modified the content and title of PR.

[anjannath]

Thanks for your contribution!