chore: remove migrated samples

[Sita04]

Delete samples migrated in the PR: GoogleCloudPlatform/java-docs-samples#7364

[snippet-bot]

Here is the summary of changes.

You are about to delete 5 region tags.

• samples/snippets/src/main/java/CreateWithContainerNoMounting.java:15, tag batch_create_container_job
• samples/snippets/src/main/java/CreateWithScriptNoMounting.java:15, tag batch_create_script_job
• samples/snippets/src/main/java/DeleteJob.java:15, tag batch_delete_job
• samples/snippets/src/main/java/GetJob.java:15, tag batch_get_job
• samples/snippets/src/main/java/ListJobs.java:15, tag batch_list_jobs

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