The "Sign in" heading + "Choose a sign-in method to continue." subtitle
were committee copy: the brand header identifies the app, the button
already labels the action. Removed both visible elements; kept an
``sr-only`` h1 ("Sign in to Equalify Reflow") so the page still has a
heading landmark for screen-reader navigation.
Same simplification applied to basic mode (the form labels + submit
button text already communicate everything the heading was repeating).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>