refactoring

Resolve #7779

src/server/web/views/channel.pug

@@ -1,21 +0,0 @@
-extends ./base
-
-block vars
-	- const title = channel.name;
-	- const url = `${config.url}/channels/${channel.id}`;
-
-block title
-	= `${title} | ${instanceName}`
-
-block desc
-	meta(name='description' content= channel.description)
-
-block og
-	meta(property='og:type'        content='article')
-	meta(property='og:title'       content= title)
-	meta(property='og:description' content= channel.description)
-	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= channel.bannerUrl)
-
-block meta
-	meta(name='twitter:card' content='summary')