Update TODO_PATCH.md

docs/TODO_PATCH.md

@@ -8,8 +8,6 @@ The bugfixes of the still not released version are in `beta` branche.
 ## Contributing
 Please create an issue to introduce a bug instead of adding pull request to this file.
 
-## Known issues
-* ...
-
 ## Next release
 - [x] lv_slider: don't let indicator or bar to disappear because of hpad/vpad
+- [ ] lv_ta: memory leak if deleted in password mode