chore(login): remove unused ErrorCallout component

Deletes the ErrorCallout.tsx file as it is not used anywhere in the codebase. This cleans up dead
code from the project.

Addresses https://github.com/fallenbagel/jellyseerr/pull/1505#discussion_r2195045066

src/components/Login/ErrorCallout.tsx

@@ -1,26 +0,0 @@
-import Alert from '@app/components/Common/Alert';
-import { Transition } from '@headlessui/react';
-import React from 'react';
-
-interface LoginErrorProps {
-  error: string;
-}
-
-const LoginError: React.FC<LoginErrorProps> = ({ error }) => {
-  return (
-    <Transition
-      as="div"
-      show={!!error}
-      enter="transition-opacity duration-300"
-      enterFrom="opacity-0"
-      enterTo="opacity-100"
-      leave="transition-opacity duration-300"
-      leaveFrom="opacity-100"
-      leaveTo="opacity-0"
-    >
-      <Alert type="error">{error}</Alert>
-    </Transition>
-  );
-};
-
-export default LoginError;