This reverts commit c94a5589.

This file is no longer used. Move needed strings to aboutTor.dtd

Kathleen Brade authored Aug 15, 2018 and Georg Koppen committed Aug 15, 2018

Add strings for use by new user onboarding.
Add "TorOpenSecuritySettings" observer.

Include the localizable strings for the about:tbupdate page
in Torbutton.

To keep the browser.startup.homepage pref value out of translators
hands, all of the localized browser.properties files have been
removed and the pref value (about:tor) has been moved to a new
non-localized.properties file.

We no longer provide a value for spellchecker.dictionary, which
means non en-US users will probably need to set their spellchecking
language from the browser context menu or via about:config after
they install a dictionary for their language. The browser will also
consult the LANG environment variable and use a "default default"
of en-US if an en-US dictionary is installed.

Patch by Pearl Crescent

Import aboutDialog.dtd and aboutTor.properties from Transifex.
Improved import-translations.sh to check that all .dtd and
  .properties files are imported.
Work around a Transifex issue that caused some entities to be
  encoded twice.