remove shadow from the header

src/app/layout.tsx

@@ -32,7 +32,7 @@ export default function RootLayout({
             enableSystem
             disableTransitionOnChange
           >
-            <header className="dark:text-white text-gray-900 px-4 py-3 font-bold shadow flex justify-between items-center-safe">
+            <header className="dark:text-white text-gray-900 px-4 py-3 font-bold flex justify-between items-center-safe">
               <Link href={"/"}>
                 {metadata.title as string || "iCal PWA"}
               </Link>