Updated mediawiki/extensions
Project: mediawiki/extensions/MwEmbedSupport  e78c8fe9a80a93a40e5182ab1da0bb47a56ef892

Removed unused pxToEm function

Bug: 66359
Change-Id: I4e53abd3291f9c3db9af86821af9722ead4e1663
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/592