Remove unused CSS classes (#5369)

* crate/version: Remove unused CSS class

* Header: Remove unused CSS class

Author: Turbo87

app/components/header.module.css

@@ -110,11 +110,6 @@
     opacity: 0.5;
 }
 
-.doc-links {
-    left: auto;
-    min-width: 150px;
-}
-
 .nav {
     grid-area: nav;
     display: flex;

app/styles/crate/version.module.css

@@ -25,15 +25,6 @@
     }
 }
 
-.about {
-    line-height: 180%;
-    margin-bottom: 40px;
-
-    > h3 {
-        margin-top: 0;
-    }
-}
-
 .no-readme {
     padding: 40px 15px;
     text-align: center;