patch 9.0.0278: the +wildignore feature is nearly always available

Problem:    The +wildignore feature is nearly always available.
Solution:   Graduate +wildignore for consistency.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index b3084f3..a41e675 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -6260,13 +6260,7 @@
 		0
 #endif
 		},
-	{"wildignore",
-#ifdef FEAT_WILDIGN
-		1
-#else
-		0
-#endif
-		},
+	{"wildignore", 1},
 	{"wildmenu",
 #ifdef FEAT_WILDMENU
 		1