chore(samples): remove migrated samples

[grayside]

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[snippet-bot[bot]]

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- [samples/quickstart.js:18](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/quickstart.js#L18), tag `cloudbuild_quickstart`(usage: [page 1](https://cloud.google.com/build/docs/samples/cloudbuild-quickstart)).

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Here is the summary of changes.

You are about to delete 20 region tags.

- [samples/generated/v1/cloud_build.approve_build.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.approve_build.js#L24), tag `cloudbuild_v1_generated_CloudBuild_ApproveBuild_async` - [samples/generated/v1/cloud_build.cancel_build.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.cancel_build.js#L24), tag `cloudbuild_v1_generated_CloudBuild_CancelBuild_async` - [samples/generated/v1/cloud_build.create_build.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.create_build.js#L24), tag `cloudbuild_v1_generated_CloudBuild_CreateBuild_async` - [samples/generated/v1/cloud_build.create_build_trigger.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.create_build_trigger.js#L24), tag `cloudbuild_v1_generated_CloudBuild_CreateBuildTrigger_async` - [samples/generated/v1/cloud_build.create_worker_pool.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.create_worker_pool.js#L24), tag `cloudbuild_v1_generated_CloudBuild_CreateWorkerPool_async` - [samples/generated/v1/cloud_build.delete_build_trigger.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.delete_build_trigger.js#L24), tag `cloudbuild_v1_generated_CloudBuild_DeleteBuildTrigger_async` - [samples/generated/v1/cloud_build.delete_worker_pool.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.delete_worker_pool.js#L24), tag `cloudbuild_v1_generated_CloudBuild_DeleteWorkerPool_async` - [samples/generated/v1/cloud_build.get_build.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.get_build.js#L24), tag `cloudbuild_v1_generated_CloudBuild_GetBuild_async` - [samples/generated/v1/cloud_build.get_build_trigger.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.get_build_trigger.js#L24), tag `cloudbuild_v1_generated_CloudBuild_GetBuildTrigger_async` - [samples/generated/v1/cloud_build.get_worker_pool.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.get_worker_pool.js#L24), tag `cloudbuild_v1_generated_CloudBuild_GetWorkerPool_async` - [samples/generated/v1/cloud_build.list_build_triggers.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.list_build_triggers.js#L24), tag `cloudbuild_v1_generated_CloudBuild_ListBuildTriggers_async` - [samples/generated/v1/cloud_build.list_builds.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.list_builds.js#L24), tag `cloudbuild_v1_generated_CloudBuild_ListBuilds_async` - [samples/generated/v1/cloud_build.list_worker_pools.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.list_worker_pools.js#L24), tag `cloudbuild_v1_generated_CloudBuild_ListWorkerPools_async` - [samples/generated/v1/cloud_build.receive_trigger_webhook.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.receive_trigger_webhook.js#L24), tag `cloudbuild_v1_generated_CloudBuild_ReceiveTriggerWebhook_async` - [samples/generated/v1/cloud_build.retry_build.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.retry_build.js#L24), tag `cloudbuild_v1_generated_CloudBuild_RetryBuild_async` - [samples/generated/v1/cloud_build.run_build_trigger.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.run_build_trigger.js#L24), tag `cloudbuild_v1_generated_CloudBuild_RunBuildTrigger_async` - [samples/generated/v1/cloud_build.update_build_trigger.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.update_build_trigger.js#L24), tag `cloudbuild_v1_generated_CloudBuild_UpdateBuildTrigger_async` - [samples/generated/v1/cloud_build.update_worker_pool.js:24](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/generated/v1/cloud_build.update_worker_pool.js#L24), tag `cloudbuild_v1_generated_CloudBuild_UpdateWorkerPool_async` - [samples/listBuildTriggers.js:22](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/listBuildTriggers.js#L22), tag `cloudbuild_list_build_triggers` - [samples/quickstart.js:18](https://github.com/googleapis/nodejs-cloudbuild/blob/f9518e4cafd9d99253d5d4f1e6aae861fc4a75b4/samples/quickstart.js#L18), tag `cloudbuild_quickstart`

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[generated-files-bot[bot]]

Warning: This pull request is touching the following templated files:

• samples/README.md - samples/README.md is managed by synthtool. However, a partials file can be used to update the README, e.g.: https://github.com/googleapis/nodejs-storage/blob/main/.readme-partials.yaml