Updated mediawiki/extensions
Project: mediawiki/extensions/MediaWikiChat  3b1891c583e81e95b3a8d428b3df294018e68469

Another fix for dupe timestamp bug

Prevent the duplication on recieving the messages, as trying it on sending
was futile as the messages were being handled on different threads at
EXACTLY the same time. Remove that old code.

Change-Id: I304e2260d93b744aa09a4dcd2a0f57d32678f4d0