chore: remove get_job region tag from BasicJobSample.java

[LukeSchlangen]

Description

Fixes #

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

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

[snippet-bot[bot]]

Here is the summary of changes.

You are about to delete 1 region tag.

- [jobs/v3/src/main/java/com/google/samples/BasicJobSample.java:100](https://github.com/GoogleCloudPlatform/java-docs-samples/blob/0f62a3835ca6b370b5eeb2a56bd9b6db577180ba/jobs/v3/src/main/java/com/google/samples/BasicJobSample.java#L100), tag `get_job`

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