Revert "Add API tests for FileStore."

This reverts commit 2ff78c54b8af49ce42e40a3afa2ad91974c0a57f.

Reason for revert: b/217531906 - assumptions about root filestore not valid on GSI

Change-Id: I53b9cd2369c927c527e500eedc84e8cec9257666
2 files changed