Revert "Implement Account Discovery API."

This reverts commit 58fa836210a2872e58e8890456c2cd14a4b0fd3d.

Change-Id: Iffc9c5eb63db382b720b45ff5e8f1948db908a03
(cherry picked from commit 2e22cfbefb8848e52e29827c94225ed9409af4ad)
5 files changed