Remove 9.21-only release note from May 2026 release notes

Issue #5826 has two different fixes: one released in April 2026 that
applies to 9.20 and 9.18, and another released in May 2026 that applies
to 9.21. The 9.21 release note was mistakenly included in the release
notes for 9.20 and 9.18. This commit removes it.

(cherry picked from commit 931bc821d82dfa259bb6ed82706a891f200a0976)

diff --git a/doc/notes/notes-9.18.49.rst b/doc/notes/notes-9.18.49.rst
index 3bd35d7bff7889229ba6784d993eac2666b44bce..859d765b087af7abb60e4774605df9161b930421 100644 (file)
--- a/doc/notes/notes-9.18.49.rst
+++ b/doc/notes/notes-9.18.49.rst
@@ -101,13 +101,6 @@ Bug Fixes
   handled consistently with RRSIG records during update processing.
   :gl:`#5818`
 
-- Fix :option:`rndc modzone` behavior for a zone in named.conf.
-
-  If a zone was present in the configuration file and not originally
-  added by :option:`rndc addzone`, :option:`rndc modzone` for that zone would succeed
-  once but subsequent :option:`rndc modzone` attempts would fail. This has been
-  fixed. :gl:`#5826`
-
 - Fix zone verification of NSEC3 signed zones.
 
   Previously, when computing the compressed bitmap during verification