More iostream removal.

Summary:
We do not need it and it adds a static initialization

This is the last extra one in liger. The other places actually need iostream to print things

Reviewed By: yfeldblum

Differential Revision: D4286095

fbshipit-source-id: 44a827e48e9fb9106626e784592eb194dff83bf6

diff --git a/folly/MacAddress.cpp b/folly/MacAddress.cpp
index bdc54a3a57a942237f529824f9762fc39225dc9e..1ce5d1ec3615ace3fd22a7798bcafc31545e864e 100644 (file)
--- a/folly/MacAddress.cpp
+++ b/folly/MacAddress.cpp
@@ -16,7 +16,7 @@
 
 #include <folly/MacAddress.h>
 
-#include <iostream>
+#include <ostream>
 
 #include <folly/Exception.h>
 #include <folly/IPAddressV6.h>