patch 9.0.0529: appveyor setup contains outdated lines

Problem:    Appveyor setup contains outdated lines.
Solution:   Remove outdated lines. (Ken Takata, closes #11182)
diff --git a/src/version.c b/src/version.c
index ddb9431..555adf5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    529,
+/**/
     528,
 /**/
     527,