Since distribution search engines have all moved into mozilla-central, so we no longer need to check the loadPath, which potentially wasn't reliable anyway.
Addtionally, we don't need to check `extensions.installedDistroAddon` since these are built-in add-ons, and distributions don't install search engines separately.
Differential Revision: https://phabricator.services.mozilla.com/D72743
Since distribution search engines have all moved into mozilla-central, so we no longer need to check the loadPath, which potentially wasn't reliable anyway.
Addtionally, we don't need to check `extensions.installedDistroAddon` since these are built-in add-ons, and distributions don't install search engines separately.
Differential Revision: https://phabricator.services.mozilla.com/D72743