Revert "kata-deploy: Use readinessProbe to ensure everything is ready"

This reverts commit 5ec9ae0f04, for two
main reasons:
* The readinessProbe was misintepreted by myself when working on the
  original PR
* It's actually causing issues, as the pod ends up marked as not
  healthy.

tools/packaging/kata-deploy/scripts/kata-deploy.sh

@@ -325,13 +325,11 @@ function main() {
 			install_artifacts
 			configure_cri_runtime "$runtime"
 			kubectl label node "$NODE_NAME" --overwrite katacontainers.io/kata-runtime=true
-			touch /opt/kata/kata-deployed
 			;;
 		cleanup)
 			cleanup_cri_runtime "$runtime"
 			kubectl label node "$NODE_NAME" --overwrite katacontainers.io/kata-runtime=cleanup
 			remove_artifacts
-			rm /opt/kata/kata-deployed
 			;;
 		reset)
 			reset_runtime $runtime