patch 8.1.1066: VIMDLL isn't actually used

Problem:    VIMDLL isn't actually used.
Solution:   Remove VIMDLL support.
diff --git a/src/version.c b/src/version.c
index be23284..ea04d06 100644
--- a/src/version.c
+++ b/src/version.c
@@ -776,6 +776,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1066,
+/**/
     1065,
 /**/
     1064,