Updated mediawiki/extensions
Project: mediawiki/extensions/LiquidThreads  fd34d0bc1e3efb746ae2dbe029c3b7e9c314b780
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remove unused lqt-quote and lqt-quote-intro messages

As far as I could see, these are essentially unused since 2009, commit
351583c06, and entirely unused since 0d969301e (after dead code removal).

Change-Id: Iaaf4fa9a28d28064ade9fa83082aa7d2ab2e89ba