chore(ai-platform): remove video action training pipeline samples

[angelcaamal]

Description

This PR removes all AI Platform code samples and references associated with the following deprecated region tags:

• aiplatform_create_training_pipeline_video_classification_sample
• aiplatform_create_training_pipeline_video_action_recognition_sample
• aiplatform_create_training_pipeline_video_object_tracking_sample

These samples were previously marked as:

• deprecated: true
• exclude_from_sample_browser: true

within the aiplatform.txtpb configuration file. Since they are no longer maintained, visible, or needed, they have been completely cleaned up from the repository.
Fixes Internal: b/532672926

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

Checklist

• I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• Tests pass: npm test (see Testing)
• Lint pass: npm run lint (see Style)
• Required CI tests pass (see CI testing)
• 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)
• This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new sample directory, and I created GitHub Actions workflow 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

Note: Any check with (dev), (experimental), or (legacy) can be ignored and should not block your PR from merging (see CI testing).

[gemini-code-assist]

Code Review

This pull request removes several Node.js sample and test files related to creating AI Platform training pipelines for video action recognition, video classification, and video object tracking. Since there are no review comments, I have no feedback to provide.

[snippet-bot]

Here is the summary of changes.

You are about to delete 3 region tags.

• ai-platform/snippets/create-training-pipeline-video-action-recognition.js:26, tag aiplatform_create_training_pipeline_video_action_recognition_sample
• ai-platform/snippets/create-training-pipeline-video-classification.js:26, tag aiplatform_create_training_pipeline_video_classification_sample
• ai-platform/snippets/create-training-pipeline-video-object-tracking.js:26, tag aiplatform_create_training_pipeline_video_object_tracking_sample

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[amcolin]

I can confirm that there is no reference using these tags. LGTM