chore: fix tailwind linter warning

web/src/css/index.css

@@ -12,7 +12,6 @@ html,
 }
 
 @layer utilities {
-  @variants responsive {
   /* Hide scrollbar for Chrome, Safari and Opera */
   .no-scrollbar::-webkit-scrollbar {
     display: none;
@@ -23,5 +22,4 @@ html,
     -ms-overflow-style: none; /* IE and Edge */
     scrollbar-width: none; /* Firefox */
   }
-  }
 }