patch 8.2.4000: Coverity warns for checking for NULL pointer after using it

Problem:    Coverity warns for checking for NULL pointer after using it.
Solution:   Remove check for NULL.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4000,
 /**/
     3999,
 /**/