refactor: remove unused (commented) styles

src/components/Header.astro

@@ -104,7 +104,6 @@ const { activeNav } = Astro.props;
   }
   .nav-container {
     @apply max-w-3xl mx-auto flex flex-col sm:flex-row justify-between items-center;
-    /* border-b-2 border-opacity-40 border-b-skin-line */
   }
   .top-nav-wrap {
     @apply w-full p-4 sm:py-8 flex justify-between items-center;
@@ -146,7 +145,6 @@ const { activeNav } = Astro.props;
     @apply w-6 h-6 fill-skin-base hover:fill-skin-accent;
   }
   #theme-btn {
-    /* @apply w-12 h-12 sm:w-9 sm:h-9 flex justify-center items-center sm:inline-block; */
     @apply p-3 sm:p-1;
   }
   #theme-btn svg {