[Feat][Sample-yaml] Deprecated python sample yaml test cleanup

Closes: ray-project#2506
Signed-off-by: Chi-Sheng Liu <[email protected]>

.buildkite/test-sample-yamls.yml

@@ -1,46 +1,6 @@
 #ci:group=:yaml: Sample YAML tests
 
 # TODO: Remove deprecated tests after migrating to Go tests
-- label: '(Deprecated) Test RayCluster Sample YAMLs (nightly operator)'
-  instance_size: large
-  image: golang:1.22
-  commands:
-    - ./.buildkite/setup-env.sh
-    # Build nightly KubeRay operator image
-    - pushd ray-operator
-    - IMG=kuberay/operator:nightly make docker-image
-    - popd
-    # Use nightly KubeRay operator image
-    - source .venv/bin/activate && BUILDKITE_ENV=true OPERATOR_IMAGE=kuberay/operator:nightly python3 tests/test_sample_raycluster_yamls.py
-
-- label: '(Deprecated) Test RayCluster Sample YAMLs (latest release)'
-  instance_size: large
-  image: golang:1.22
-  commands:
-    - ./.buildkite/setup-env.sh
-    # Use KubeRay operator image from the latest release
-    - source .venv/bin/activate && BUILDKITE_ENV=true OPERATOR_IMAGE=quay.io/kuberay/operator:v1.2.2 python3 tests/test_sample_raycluster_yamls.py
-
-- label: '(Deprecated) Test RayJob Sample YAMLs (nightly operator)'
-  instance_size: large
-  image: golang:1.22
-  commands:
-    - ./.buildkite/setup-env.sh
-    # Build nightly KubeRay operator image
-    - pushd ray-operator
-    - IMG=kuberay/operator:nightly make docker-image
-    - popd
-    # Use nightly KubeRay operator image
-    - source .venv/bin/activate && BUILDKITE_ENV=true OPERATOR_IMAGE=kuberay/operator:nightly python3 tests/test_sample_rayjob_yamls.py
-
-- label: '(Deprecated) Test RayJob Sample YAMLs (latest release)'
-  instance_size: large
-  image: golang:1.22
-  commands:
-    - ./.buildkite/setup-env.sh
-    # Use KubeRay operator image from the latest release
-    - source .venv/bin/activate && BUILDKITE_ENV=true OPERATOR_IMAGE=quay.io/kuberay/operator:v1.2.2 python3 tests/test_sample_rayjob_yamls.py
-
 - label: '(Deprecated) Test RayService Sample YAMLs (nightly operator)'
   instance_size: large
   image: golang:1.22