Bug 1575876 - Drop header unused on FreeBSD that breaks with new libc++. r=bwc

--HG--
extra : histedit_source : ef16b712dcd62120d01b902a5f734a8163c907a3

media/mtransport/third_party/nICEr/src/stun/stun.h

@@ -41,7 +41,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <sys/socket.h>
 #ifndef LINUX
 #include <net/if.h>
-#if !defined(__OpenBSD__) && !defined(__NetBSD__)
+#ifdef DARWIN
 #include <net/if_var.h>
 #endif
 #include <net/if_dl.h>