chore: remove ConfigMap from ray-job.kueue-toy-sample.yaml

[kevin85421]

Why are these changes needed?

https://github.com/ray-project/kuberay/pull/1956#discussion_r1511337275

This PR removes ConfigMap from the YAML. In this doc, we need to run kubectl create -f ray-job.kueue-toy-sample.yaml multiple times. If the YAML includes a ConfigMap, users may see a warning message indicating that the ConfigMap already exists. Removing the ConfigMap improves the UX.

Related issue number

Checks

• [ ] I've made sure the tests are passing.
• Testing Strategy
  • [ ] Unit tests
  • [ ] Manual tests
  • [ ] This PR is not tested :(

[kevin85421]

cc @andrewsykim

[andrewsykim]

LGTM, my other comments are not blocking