1 files changed, 0 insertions, 17 deletions
diff --git a/missing/isnan.c b/missing/isnan.c
deleted file mode 100644
index 5846947f50..0000000000
--- a/missing/isnan.c
+++ /dev/null
@@ -1,17 +0,0 @@
-/* public domain rewrite of isnan(3) */
-
-#include "ruby/missing.h"
-
-static int double_ne(double n1, double n2);
-
-int
-isnan(double n)
-{
-    return double_ne(n, n);
-}
-
-static int
-double_ne(double n1, double n2)
-{
-    return n1 != n2;
-}