Backed out 3 changesets (bug 1569581) for ESLint failure at browser/components/about/AboutProtectionsHandler.jsm on a CLOSED TREE

Backed out changeset 9c3b3043ddc7 (bug 1569581)
Backed out changeset 2a66b79c7085 (bug 1569581)
Backed out changeset 88a9bc458456 (bug 1569581)