Remove duplicate changelog entry

Signed-off-by: Philippe Ombredanne <[email protected]>

Author: pombredanne

CHANGELOG.rst

@@ -203,17 +203,6 @@ License detection:
 
   See https://github.com/nexB/scancode-toolkit/issues/3343
 
-v31.2.5 - 2023-04-21
-----------------------------------
-
-This is a minor backport release.
-
-This adds license rule changes and was requested here: 
-https://github.com/nexB/scancode-toolkit/issues/3310
-This was originally merged in #3218 and included in
-the latest release v32.x, and is also being backported
-now to v31.2.x
-
 
 v31.2.6 - 2023-04-25
 ----------------------------------