Drop the placeholder from the otp field

allauth sets placeholder="Code" on the field. Grey text sitting inside the otp
boxes reads as an already-typed code, so it goes -- the sr-only label outside the
box still names the field.

Suppressed with placeholder=False rather than by deleting the key: as_widget()
merges the widget's own attrs back in at render time, so popping it from a copy
does nothing. Django's attribute template omits attrs whose value is False.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

templates/allauth/elements/fields.html

@@ -50,7 +50,7 @@
                     {% if attrs.unlabeled %}<label class="sr-only" for="{{ field.id_for_label }}">{{ field.label }}</label>{% endif %}
                     <div class="flex justify-center">
                         <div class="otp otp-lg" data-otp>
-                            {{ field|daisy:"" }}
+                            {{ field|as_otp }}
                             <span></span>
                             <span></span>
                             <span></span>