Remove unused CSS class

Author: delphidabbler

Src/Res/CSS/detail.css

@@ -107,10 +107,6 @@ pre {
   background-color: #FCD9F3;
 }
 
-#auto-updates .caption {
-  background-color: #FFDFAF;
-}
-
 #help .caption {
   background-color: #D3FFB6;
 }