Bug 1862980 - Port bug 1845727: moz-support-link ftl file now available from toolkit. r=rjl

Differential Revision: https://phabricator.services.mozilla.com/D192683

--HG--
extra : moz-landing-system : lando

mail/locales/en-US/browser/components/mozSupportLink.ftl

@@ -1,5 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-moz-support-link-text = Learn more