Remove tip box from UI

Deleted the tip box element from index.html and its associated styles from style.css to simplify the interface and reduce visual clutter.

index.html

@@ -162,18 +162,6 @@
                 >
               </li>
             </ul>
-
-            <div class="tip-box">
-              <i class="fas fa-lightbulb"></i>
-              <strong>Pro Tip:</strong> Browse the
-              <a
-                href="https://github.com/xixu-me/favicons/tree/assets"
-                target="_blank"
-              >
-                assets branch</a
-              >
-              to verify icon availability before finalizing your configuration.
-            </div>
           </div>
         </div>
       </div>

style.css

@@ -683,37 +683,6 @@ body::before {
   font-size: 0.9em;
 }
 
-.tip-box {
-  background: rgba(34, 197, 94, 0.1);
-  border: 1px solid rgba(34, 197, 94, 0.3);
-  border-radius: 8px;
-  padding: 1rem;
-  margin-top: 1.5rem;
-  display: flex;
-  align-items: flex-start;
-  gap: 0.75rem;
-}
-
-.tip-box i {
-  color: #059669;
-  margin-top: 0.2rem;
-  flex-shrink: 0;
-}
-
-.tip-box strong {
-  color: #059669;
-}
-
-[data-theme="dark"] .tip-box {
-  background: rgba(34, 197, 94, 0.15);
-  border-color: rgba(34, 197, 94, 0.4);
-}
-
-[data-theme="dark"] .tip-box i,
-[data-theme="dark"] .tip-box strong {
-  color: #10b981;
-}
-
 /* Responsive adjustments for info banner */
 @media (max-width: 768px) {
   .info-content ul {