bpo-30722: Fix NEWS entry (GH-8501)

Author: berkerpeksag

Misc/NEWS.d/3.6.4rc1.rst

@@ -1100,9 +1100,6 @@ for code and tests by Guilherme Polo and Cheryl Sabella, respectively.
 
 Make redemo work with Python 3.6 and newer versions.
 
-In Python 3.6, flags like re.DOTALL became members of an enum.IntFlag so
-usages like ``getattr(re, 'DOTALL')`` are invalid.
-
 Also, remove the ``LOCALE`` option since it doesn't work with string
 patterns in Python 3.