patch 8.2.0086: build error for small version

Problem:    Build error for small version. (Tony Mechelynck)
Solution:   Only use "user_data" with the +eval feature. Remove unused
            variable.
diff --git a/src/version.c b/src/version.c
index d159ceb..eff491d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    86,
+/**/
     85,
 /**/
     84,