Gadget-GlobalStyle.css

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/* CSS placed here will be applied to all skins on both desktop and mobile
   The "dark" and "mobile" body classes can be used to target different scenarios */

body.anon.ns-content #stub,
body.anon.ns-content .noticebox,
body.anon .plainlinksneverexpand > * {
	display: none !important;
}

MediaWiki:Gadget-GlobalStyle.css