diff --git a/doc/en/Developer/Development_track.md b/doc/en/Developer/Development_track.md
index b3c2afd371ed8e40305a599e95428eaa2b0774a8..302faf8b945dd41edcb565c6f860a13dad1efc90 100644
--- a/doc/en/Developer/Development_track.md
+++ b/doc/en/Developer/Development_track.md
@@ -47,7 +47,6 @@ Essential (v 4.5.0)
 7. Better signaling for clone mode*
 8. Tidy and document JS*
 9. test override css and override js*
-10. MathJax async loading*
 
 
 Later