test(types): drop pane from the ObjectFormSection key census

Claude-Session: https://claude.ai/code/session_01JQwxbWHWPRD5rZXeY69YvL
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

ui/packages/types/src/__tests__/object-form-section-style-keys-undeclared.test.ts

@@ -84,7 +84,6 @@ const DECLARED_KEYS = [
   'collapsible',
   'collapsed',
   'columns',
-  'pane',
   'fields',
   'group',
   'visibleWhen',