Updated mediawiki/extensions Project: mediawiki/extensions/MultimediaViewer 531947e80279d9eda02468729fd0a5bd0960600e
mmv.mixins.less: Remove '-ms-linear-gradient'
No stable versions of IE have an '-ms-linear-gradient'. Any lines using
the same have been removed.
Bug: T100285
Change-Id: I9fccb3f2208433d2759949a39b86b46d5b71eac1