Revert "enforcePhoneAccounts should unregister unresolvable accts"

This reverts commit 01083f3ac8ec0a5e81dac8e9c49a8677649450e2.

Reason for revert: causes regression in phone account registration b/315117203

Bug: 315117203 (regression)
Bug: 310739126

Change-Id: I1faea0a313e1dadb66d6d082e0d31294033b56e0
2 files changed