[tor-bugs] #21920 [Applications/Tor Launcher]: Revert locale selection dialog changes in Tor Launcher

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#21920: Revert locale selection dialog changes in Tor Launcher
-------------------------------------+-------------------------------------
     Reporter:  gk                   |      Owner:  brade
         Type:  enhancement          |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Launcher                           |   Keywords:  tbb-7.0-must-alpha,
     Severity:  Normal               |  TorBrowserTeam201704
Actual Points:                       |  Parent ID:
       Points:                       |   Reviewer:
      Sponsor:                       |
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 So far, we only used the locale selection dialog in the hardened builds.
 That is not needed anymore and can get removed on `master` for the time
 being. This makes dealing with Tor Launcher in our different Tor Browser
 series a lot easier. We can pick those changes up again later or build on
 top of them if needed

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21920>
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