Updated mediawiki/extensions Project: mediawiki/extensions/WikiEditor 2946fcd56d8ad62ccee448cd8f8e2de470162ad7

Remove reference to magnify-clip.png

magnify-clip.png was recently removed from the core styles directory,
but the Help panel of the WikiEditor still references it by way of i18n
message: wikieditor-toolbar-help-content-file-result

Also remove unused local copy

Bug: T85920
Change-Id: Icc17092c0f854360b2f2999b8f153827bf194c0c