Remove pre style rules from elegant.css. Bootstrap and Pygments have them defined already

static/css/elegant.css

@@ -120,10 +120,6 @@ pre {
     word-break: normal;
     word-wrap: normal;
 }
-.highlight pre {
-    background-color: #fdf6e3;
-    border-radius: 3px 3px 3px 3px;
-}
 td.code .highlight pre {
     border-radius: 0 3px 3px 0;
 }