patch 8.2.0285: unused error message; cannot create s:var

Problem:    Unused error message. Cannot create s:var.
Solution:   Remove the error message. Make assignment to s:var work.
diff --git a/src/version.c b/src/version.c
index c09d556..9dc3c6f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    285,
+/**/
     284,
 /**/
     283,