[fuchsia] Fuchsia no longer has <shadow.h>

Change-Id: Iab1dca0f567953338386cd93a31f67355be23bc5
diff --git a/fuchsia/config.h b/fuchsia/config.h
index c9a60da..523f1c4 100644
--- a/fuchsia/config.h
+++ b/fuchsia/config.h
@@ -1027,7 +1027,7 @@
 /* #undef HAVE_SHA2_H */
 
 /* Define to 1 if you have the <shadow.h> header file. */
-#define HAVE_SHADOW_H 1
+/* #undef HAVE_SHADOW_H */
 
 /* Define to 1 if you have the `sigaction' function. */
 #define HAVE_SIGACTION 1