patch 9.0.0663: tests check for +cmdwin feature which is always present

Problem:    Tests check for +cmdwin feature which is always present.
Solution:   Remove the checks. (closes #11287)
diff --git a/src/version.c b/src/version.c
index 540ea37..61f2fd2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    663,
+/**/
     662,
 /**/
     661,