pathmtu/pathmtu.c: Don't explicitly set `_BSD_SOURCE'.

I have a bit set that this was necessary for some reason, but it doesn't
seem to be based on a brief inspection of wheezy's <features.h>, and
stretch's version warns that `_BSD_SOURCE' is now deprecated, because
nothing is allowed to remain stable.

diff --git a/pathmtu/pathmtu.c b/pathmtu/pathmtu.c
index 9516cd2..49c6713 100644 (file)
--- a/pathmtu/pathmtu.c
+++ b/pathmtu/pathmtu.c
@@ -26,10 +26,6 @@
 
 /*----- Header files ------------------------------------------------------*/
 
-#if defined(linux)
-#  define _BSD_SOURCE
-#endif
-
 #include "config.h"
 
 #include <assert.h>