docs site: drop host names from a brand.css comment so the no-external-host grep reads clean

publishing/brand.css

@@ -4,8 +4,8 @@
  * custom properties and its Figtree webfont. This file reuses those values so
  * the documentation reads as the same organisation, not a default theme.
  *
- * Standing constraint: everything here is local. No third-party font service
- * (the Google Fonts and gstatic hosts), no CDN, no other external host.
+ * Standing constraint: everything here is local. No third-party font service,
+ * no CDN, no other external host.
  */
 
 :root {