Remove the snippet-bot check github action from the CI pipeline

### Please make sure you have searched for information in the following guides.

- [x] Search the issues already opened: https://github.com/GoogleCloudPlatform/google-cloud-node/issues
- [x] Search StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform+node.js
- [x] Check our Troubleshooting guide: https://github.com/googleapis/google-cloud-node/blob/main/docs/troubleshooting.md
- [x] Check our FAQ: https://github.com/googleapis/google-cloud-node/blob/main/docs/faq.md
- [x] Check our libraries HOW-TO: https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md
- [x] Check out our authentication guide: https://github.com/googleapis/google-auth-library-nodejs
- [x] Check out handwritten samples for many of our APIs: https://github.com/GoogleCloudPlatform/nodejs-docs-samples
- [x] Check the API's issue tracker: https://cloud.google.com/support/docs/issue-trackers

### A screenshot that you have tested with "Try this API".

snippets bot is a way of tracking snippets.

### Link to the code that reproduces this issue. A link to a **public** Github Repository or gist with a minimal reproduction.

https://github.com/googleapis/google-cloud-node

### A step-by-step description of how to reproduce the issue, based on the linked reproduction.

Open a PR and the CI pipeline runs this check.

### A clear and concise description of what the bug is, and what you expected to happen.

This check should not be done:

### A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **

Snippets check isn't needed anymore.