refactor(vertexai): remove vertexai/gemini/GetMediaTokenCount.java related to decommissioned generativeaionvertexai_gemini_token_count_advanced region tag

[Kef131]

Description

Fixes #
b/530681617

Region tag generativeaionvertexai_gemini_token_count_advanced shows no reference in devsite along no use of the file.

Checklist

Testing

• I have tested this change on a live environment and verified it works as intended.
• 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

Compliance & Style

• I have followed Sample Format Guide
• pom.xml parent set to latest shared-configuration
• Appropriate changes to README are included in PR
• 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

Post-Approval Actions

• Please merge this PR for me once it is approved

[gemini-code-assist]

Code Review

This pull request removes the region tags for generativeaionvertexai_gemini_token_count_advanced from the GetMediaTokenCount.java file. As there are no review comments, I have no feedback to provide.

[snippet-bot]

Here is the summary of changes.

You are about to delete 1 region tag.

• vertexai/snippets/src/main/java/vertexai/gemini/GetMediaTokenCount.java:19, tag generativeaionvertexai_gemini_token_count_advanced

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment

[amcolin]

I have validated that there is no reference to this file. Good to go.