patch 8.1.1026: unused condition

Problem:    Unused condition. (Coverity)
Solution:   Remove the condition.  Also remove unused #define.
diff --git a/src/version.c b/src/version.c
index e7f3bf3..6b578c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1026,
+/**/
     1025,
 /**/
     1024,