adjust pre tag styles for blue-night theme

resource/styles/agile-admin/inverse/colors/blue-night.scss

@@ -47,8 +47,3 @@ $inline-code-bg: #0a121b;
     }
   }
 }
-
-:not(.hljs) > pre:not(.hljs) {
-  color: $bodytext;
-  background-color: $inline-code-bg;
-}