Revert "Merge pull request #20730 from lightsofapollo/l10n-collections-shared" for Gaia-unit failures

This reverts commit a74ed1e3f982633950c2f93bbb46e71be6399da6, reversing
changes made to a07855aedfe8fba42dac3c8506549870c89432c7.
Merge branch 'master' of https://github.com/mozilla-b2g/gaia