chore: remove migrated samples

[meredithslota]

Samples have been migrated to https://github.com/GoogleCloudPlatform/java-docs-samples/tree/main/automl Do not merge until snippet bot is happy.

[snippet-bot]

Here is the summary of changes.

You are about to delete 8 region tags.

• samples/snippets/src/main/java/com/google/cloud/translate/automl/DatasetApi.java:42, tag automl_translate_import_data
• samples/snippets/src/main/java/com/google/cloud/translate/automl/ModelApi.java:41, tag automl_translate_list_models
• samples/snippets/src/main/java/com/google/cloud/translate/automl/ModelApi.java:83, tag automl_translate_get_operation_status
• samples/snippets/src/main/java/com/google/cloud/vision/ClassificationUndeployModel.java:19, tag automl_vision_classification_undeploy_model
• samples/snippets/src/main/java/com/google/cloud/vision/PredictionApi.java:48, tag automl_vision_predict
• samples/snippets/src/main/java/com/google/cloud/vision/samples/automl/ClassificationUndeployModel.java:19, tag automl_vision_classification_undeploy_model
• samples/snippets/src/main/java/com/google/cloud/vision/samples/automl/ModelApi.java:42, tag automl_vision_create_model
• samples/snippets/src/main/java/com/google/cloud/vision/samples/automl/PredictionApi.java:52, tag automl_vision_predict

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[Sita04]

Thanks for the changes.