Revert "Re-add notification history tunable"

This reverts commit 99119cbc67b268c1104d3e454accad65ee8a92e2.

Reason for revert: fixing apct/device_boot_health_check_extra breakage

Bug: 164544701
Change-Id: Ib0aa74d53a614eaf51dc0859cbd434e0a0913344
2 files changed