Revert "Add unit tests for LoaderTask"

This reverts commit 4c7d7d6749a021a15f76aa355bbd3db65a3a2d4c.

Reason for revert: New Test assets were getting pulled into the release APK, making the APK size growth too much. I will re-upload when I figure out how to avoid this.

Change-Id: I738eb6c26632eeee30be4098d0225836d283b218
4 files changed