Updated mediawiki/skins
Project: mediawiki/skins/BlueSky  9312b925007248ea31e68f216fd051d3d1c2052d

* Removed some unused (global) variables.
* Removed old RTL-related code (the variables were unused anyway); if we at a later date determine that we have to set body { margin: 25px; } for Internet Explorer when using a RTL language, let's come up with a better way to add that.
* Fixed some HTML comments to be more accurate.

Change-Id: I745c3f3ea395b9d271878f282f5da163698bb378