Remove obsolete and empty files

[flodolo]

This is pending confirmation that we have the build code in ESR115 to deal with missing files.

[flodolo]

This feels too large. I'm guessing it's also Pontoon adding them, because of the new sync code?

CC @eemeli

[flodolo]

There are files that are obsolete (missing from the reference):

• /browser/browser/firefoxWebAuthn.ftl
• /toolkit/toolkit/global/mozCard.ftl
• /toolkit/toolkit/global/timepicker.ftl
• /toolkit/toolkit/reportBrokenSite/reportBrokenSite.ftl

Another file is obsolete for mobile:

• /mobile/chrome/region.properties

The other are all files with just comments, either created by my previous script, or by Pontoon with the new sync.

One way to look at this diff is locally using the GitHub desktop app, as you can visually browse each commit.

Some commit, for locales that are very behind, are very large. Example, Xhosa: a76b22d

[eemeli]

As we're still using the old build tooling for 115 and 128, we shouldn't remove yet the empty files that are helping them avoid fallback, but the obsolete files you list should be removable now as they're not used anywhere at all.