Updated mediawiki/extensions
Project: mediawiki/extensions/Scribunto  50a1f556b7be6373801cb7f0d18e2c8bccbde02c

Remove leftover code for titles in messages

Since the code related to titles in messages was removed from
mw.message.lua, remove it from here as well. Titles have no effect since
only the plain format is available.

Change-Id: I0c96a4e831abe61100b48cb6a898ad8dbffd8a72