refactor: remove region_tags redudancy on Endpoints Kubernetes tutorial

[Kef131]

Description

Fixes # b/384511454
Removed these region tags, due they are not used on cloud java Endpoints samples.

• endpoints_secret1_yaml_java
• endpoints_service_yaml_java
• endpoints_secret2_yaml_java

Please go to b/384511454 for context and support of this PR.

Checklist

• I have followed Sample Format Guide
• pom.xml parent set to latest shared-configuration
• Appropriate changes to README are included in PR
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• Tests pass: mvn clean verify required
• Lint passes: mvn -P lint checkstyle:check required
• Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[gemini-code-assist]

Code Review

This pull request removes several region tag comments (such as # [START ...] and # [END ...]) from the Kubernetes deployment configuration file esp_echo_http.yaml. I have no feedback to provide as there are no review comments and the changes are straightforward cleanup.

[snippet-bot]

Here is the summary of changes.

You are about to delete 3 region tags.

• endpoints/getting-started/k8s/esp_echo_http.yaml:41, tag endpoints_secret1_yaml_java
• endpoints/getting-started/k8s/esp_echo_http.yaml:47, tag endpoints_service_yaml_java
• endpoints/getting-started/k8s/esp_echo_http.yaml:61, tag endpoints_secret2_yaml_java

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[amcolin]

These changes look good to me. I’ve validated that none of these region tags are in use, and since the file isn't referenced anywhere, removing the entire file as a cleanup should be fine to ensure there’s no orphaned code.