patch 8.1.2165: mapping test fails on Mac

Problem:    Mapping test fails on Mac.
Solution:   Remove the default Mac mapping.
diff --git a/src/version.c b/src/version.c
index f6a3817..e7ba706 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2165,
+/**/
     2164,
 /**/
     2163,