Updated mediawiki/extensions
Project: mediawiki/extensions/Nostalgia  65075c9c6d50b3b37fc69abe044f970659c56bf6

Remove $wgExtraSubtitle

Remove $wgExtraSubtitle, which is defined as empty in DefaultSettings.php and is nowhere else used or defined (since almost forever it seems)

Change-Id: Ic5121b820f0ce87222e292c447e9ce0014186d76