refactor(ui): simplify new icon submission alert

- Remove Check icon from new icon submission alert
- Simplify alert text by removing bold formatting
- Improve visual consistency with cleaner design

web/src/components/advanced-icon-submission-form.tsx

@@ -253,9 +253,8 @@ export function AdvancedIconSubmissionForm() {
 
 					{iconName && !isExistingIcon && (
 						<Alert className="border-green-500/50 bg-green-500/10">
-							<Check className="h-4 w-4 text-green-500" />
 							<AlertDescription className="text-green-600 dark:text-green-400">
-								This is a <strong>new icon</strong> submission.
+								This is a new icon submission.
 							</AlertDescription>
 						</Alert>
 					)}