Remove YoutubePreview CSS

src/app/components/all.scss

@@ -23,7 +23,6 @@
 @import "./elements/TagList";
 @import "./elements/Reputation";
 @import "./elements/Reblog";
-@import "./elements/YoutubePreview";
 @import "./elements/ShareMenu";
 @import "./elements/Author/styles";
 @import "./elements/AuthorDropdown";