chore(automl): remove deprecated samples

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Here is the summary of changes.

You are about to delete 19 region tags.

- [automl/beta/batch_predict.py:16](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/batch_predict.py#L16), tag `automl_batch_predict_beta` - [automl/beta/cancel_operation.py:17](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/cancel_operation.py#L17), tag `automl_cancel_operation` - [automl/beta/delete_dataset.py:16](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/delete_dataset.py#L16), tag `automl_delete_dataset_beta` - [automl/beta/delete_model.py:18](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/delete_model.py#L18), tag `automl_delete_model_beta` - [automl/beta/get_model.py:18](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/get_model.py#L18), tag `automl_get_model_beta` - [automl/beta/get_model_evaluation.py:18](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/get_model_evaluation.py#L18), tag `automl_video_classification_get_model_evaluation_beta` - [automl/beta/get_model_evaluation.py:19](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/get_model_evaluation.py#L19), tag `automl_video_object_tracking_get_model_evaluation_beta` - [automl/beta/get_model_evaluation.py:49](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/get_model_evaluation.py#L49), tag `automl_video_object_tracking_get_model_evaluation_beta` - [automl/beta/get_operation_status.py:15](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/get_operation_status.py#L15), tag `automl_get_operation_status_beta` - [automl/beta/import_dataset.py:16](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/import_dataset.py#L16), tag `automl_import_data_beta` - [automl/beta/list_datasets.py:16](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/list_datasets.py#L16), tag `automl_video_classification_list_datasets_beta` - [automl/beta/list_datasets.py:17](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/list_datasets.py#L17), tag `automl_video_object_tracking_list_datasets_beta` - [automl/beta/list_datasets.py:46](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/list_datasets.py#L46), tag `automl_video_object_tracking_list_datasets_beta` - [automl/beta/list_models.py:18](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/list_models.py#L18), tag `automl_list_models_beta` - [automl/beta/set_endpoint.py:18](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/set_endpoint.py#L18), tag `automl_set_endpoint` - [automl/beta/video_classification_create_dataset.py:16](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/video_classification_create_dataset.py#L16), tag `automl_video_classification_create_dataset_beta` - [automl/beta/video_classification_create_model.py:15](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/video_classification_create_model.py#L15), tag `automl_video_classification_create_model_beta` - [automl/beta/video_object_tracking_create_dataset.py:15](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/video_object_tracking_create_dataset.py#L15), tag `automl_video_object_tracking_create_dataset_beta` - [automl/beta/video_object_tracking_create_model.py:15](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/e0c28735ff276c97f973d11e40ec9da4c089c942/automl/beta/video_object_tracking_create_model.py#L15), tag `automl_video_object_tracking_create_model_beta`

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