Get lollipop binaries the f out of here...

Revert "Nexus 7 (Wi-Fi) binaries for Android 5.0 (LRX21P)"

This reverts commit 3b48dbbd2f31162c229b050a64237381c3180dc1.

Revert "flo: Update blobs to L preview release"

This reverts commit 87002145d1edf96a082daec207c5bc57a982e09e.