Remove sscanf %c UPGRADING note

Author: prateekbhujel

UPGRADING

@@ -102,9 +102,6 @@ PHP 8.6 UPGRADE NOTES
 - Standard:
   . Form feed (\f) is now added in the default trimmed characters of trim(),
     rtrim() and ltrim(). RFC: https://wiki.php.net/rfc/trim_form_feed
-  . sscanf() and fscanf() %c conversions no longer stop at whitespace. They
-    still do not skip leading whitespace; whitespace is now consumed and
-    assigned as part of the result.
   . array_filter() now raises a ValueError when an invalid $mode
     argument value is passed.
   . array_change_key_case() now raises a ValueError when an invalid $case