Deleted css options for the dark mode diagram

Author: jai-serr-ace

styles/global.scss

@@ -306,21 +306,7 @@ pre.code-box,
     margin-bottom: var(--spacing-sm);
   }
 }
-   .light-mode-diagram {
-     display: block;
-   }
 
-   .dark-mode-diagram {
-     display: none;
-   }
-
-   .dark-theme .light-mode-diagram {
-     display: none;
-   }
-
-   .dark-theme .dark-mode-diagram {
-     display: block;
-   }
 
 .experimental, .deprecated {
   background-color: var(--bg-yellow);