[memory-infra] Remove thread check blacklist
The blacklist was introduced by crrev.com/2592233002 to make
thread checks stricter. The blacklist was to throttle the number
of build bot failures.
There are only few providers left and it causes a need for having
|is_enabled_| in MDM. So, remove this check.
BUG=643438
Review-Url: https://codereview.chromium.org/2844373002
Cr-Commit-Position: refs/heads/master@{#468118}
CrOS-Libchrome-Original-Commit: fde86224c05a8bb41576591b31d7a2058ed32cb1
3 files changed