[LyX/master] Release note: remove fun "bidi"

[Jean-Marc Lasgouttes]

commit f8e893ce7e9383730b9049ca6e068419fe6ee959
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Fri Oct 29 18:08:29 2021 +0200

    Release note: remove fun "bidi"
    
    As documented later, this has been removed.
---
 lib/RELEASE-NOTES |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/lib/RELEASE-NOTES b/lib/RELEASE-NOTES
index b7e870c..0c7df0f 100644
--- a/lib/RELEASE-NOTES
+++ b/lib/RELEASE-NOTES
@@ -92,8 +92,6 @@
 
 !!!The following new LyX functions have been introduced in 2.4:
 
-* bidi is a helper function to implement icons that are different between LTR and RTL text. 
-
 * buffer-reset-export advises LyX to remove the auxiliary files before doing the next
   export.