style(exam): remove debug red borders from DeviceArea

src/pages/exam/LargeScreen.tsx

@@ -16,7 +16,7 @@ const LargeScreen = () => {
   return (
     <Layout className="h-full">
       <Row>
-        <DeviceArea className="border-4 border-solid border-red-500" />
+        <DeviceArea />
       </Row>
       <Row className="h-full">
         <ContentAreaLarge />