packaging: Don't remove QEMU image

Now that the QEMU builder image provides only the environment used for
building QEMU, let's ensure it doesn't get removed.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tools/packaging/static-build/qemu/build-base-qemu.sh

@@ -67,6 +67,4 @@ sudo "${container_engine}" run \
 	-v "${PWD}":/share "${container_image}" \
 	bash -c "/root/kata-containers/tools/packaging/static-build/qemu/build-qemu.sh"
 
-sudo docker image rm "${container_image}"
-
 sudo chown ${USER}:$(id -gn ${USER}) "${PWD}/${qemu_tar}"