[Cleanup] Removing unused test code

[komer3]

This test code was probably created to run csi-sanity tests but mock the linode api calls and mock the os calls. We have already implemented CSI-Sanity tests in a much better way. We no longer need this

General:

• [ ] Have you removed all sensitive information, including but not limited to access keys and passwords?
• [ ] Have you checked to ensure there aren't other open or closed Pull Requests for the same bug/feature/question?

Pull Request Guidelines:

1. [ ] Does your submission pass tests?
2. [ ] Have you added tests?
3. [ ] Are you addressing a single feature in this PR?
4. [ ] Are your commits atomic, addressing one change per commit?
5. [ ] Are you following the conventions of the language?
6. [ ] Have you saved your large formatting changes for a different PR, so we can focus on your work?
7. [ ] Have you explained your rationale for why this feature is needed?
8. [ ] Have you linked your PR to an open issue

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 40.56%. Comparing base (401fbdb) to head (bd080ac). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #205 +/- ## ======================================= Coverage 40.56% 40.56% ======================================= Files 24 24 Lines 1622 1622 ======================================= Hits 658 658 Misses 930 930 Partials 34 34 ```

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