Revert "Fix missing headers within tabs (#178)"

This causes undefined behaviour; the exact same styles are in two
different files, causing the browser to randomly select whichever one
comes first.

This reverts commit 42aeda8.

docs/.vuepress/config.js

@@ -48,7 +48,6 @@ module.exports = {
 		[ 'link', { rel: 'mask-icon', color: '#2E3440', href: '/assets/favicon/safari-pinned-tab.svg' } ],
 		[ 'link', { rel: 'shortcut icon', href: '/assets/favicon/favicon.ico' } ],
 		[ 'link', { rel: 'stylesheet', href: 'https://use.fontawesome.com/releases/v5.6.1/css/all.css' } ],
-		[ 'link', { rel: 'stylesheet', href: '/assets/stylesheet/style-override.css' } ],
 		[ 'meta', { name: 'msapplication-TileColor', content: '#2E3440' } ],
 		[ 'meta', { name: 'msapplication-TileImage', content: '/assets/favicon/mstile-144x144.png' } ],
 		[ 'meta', { name: 'msapplication-config', content: '/assets/favicon/browserconfig.xml' } ],