Remove mobile and dark mode features from login update

Removed features related to mobile experience and dark mode support from the login page update since they were already supported

Author: kennyj42

src/content/changelog/cloudflare-one/2026-05-12-access-login-page-refresh.mdx

@@ -17,5 +17,3 @@ The updated login experience includes:
 
 - **Unified authentication card** - All sign-in options (identity provider buttons, email input, OTP) now appear in a single card with consistent styling, replacing the previous multi-section layout.
 - **Consistent button styling** - Identity provider buttons use a uniform size and layout for easier scanning and selection.
-- **Better mobile experience** - Responsive layout improvements ensure the login page renders correctly on phones and tablets.
-- **Dark mode support** - The login page now supports dark mode.