patch 8.2.3753: Vim9: function unreferenced while called is never deleted

Problem:    Vim9: function unreferenced while called is never deleted.
Solution:   Delete a function when no longer referenced.
diff --git a/src/version.c b/src/version.c
index 6d63569..aff25cf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3753,
+/**/
     3752,
 /**/
     3751,