runtime(doc): update todo list

It is now possible to use omni-completion by adding the "o" flag to
'complete'

fixes: #17393

Co-authored-by: Signed-off-by: Maxim Kim <habamax@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 578f5e8..06d98fd 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 9.1.  Last change: 2025 May 26
+*todo.txt*      For Vim version 9.1.  Last change: 2025 May 30
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -4702,8 +4702,6 @@
 
 
 Omni completion:
--   Add a flag to 'complete' to be able to do omni completion with CTRL-N (and
-    mix it with other kinds of completion).
 -   Ideas from the Vim 7 BOF at SANE:
 	- For interpreted languages, use the interpreter to obtain information.
 	  Should work for Java (Eclipse does this), Python, Tcl, etc.