Revert "Bug 858416 - Test gaia app for exercising device storage."

This reverts commit b652b178c8f4645da411cf57e9d06f0b75d51fb4.

Reverting since it got backed out in birch.
Merge pull request #9697 from dhylands/dhylands-838038-ds-test-app-master-backout

Revert "Bug 858416 - Test gaia app for exercising device storage."