minor: remove some unused std library includes from headers

acmorrow · acmorrow · commit 64883e8828fe · 2016-01-06T14:12:41.000-05:00
diff --git a/src/bsoncxx/array/element.hpp b/src/bsoncxx/array/element.hpp
@@ -18,9 +18,6 @@
 
 #include <cstddef>
 #include <cstdint>
-#include <iostream>
-#include <iterator>
-#include <type_traits>
 
 #include <bsoncxx/document/element.hpp>
 
diff --git a/src/bsoncxx/array/view.hpp b/src/bsoncxx/array/view.hpp
@@ -18,9 +18,7 @@
 
 #include <cstddef>
 #include <cstdint>
-#include <iostream>
 #include <iterator>
-#include <type_traits>
 
 #include <bsoncxx/document/view.hpp>
 #include <bsoncxx/array/element.hpp>
diff --git a/src/bsoncxx/document/element.hpp b/src/bsoncxx/document/element.hpp
@@ -18,9 +18,6 @@
 
 #include <cstddef>
 #include <cstdint>
-#include <iostream>
-#include <iterator>
-#include <type_traits>
 
 #include <bsoncxx/stdx/string_view.hpp>
 
diff --git a/src/bsoncxx/document/view.hpp b/src/bsoncxx/document/view.hpp
@@ -18,9 +18,7 @@
 
 #include <cstddef>
 #include <cstdint>
-#include <iostream>
 #include <iterator>
-#include <type_traits>
 
 #include <bsoncxx/document/element.hpp>
 #include <bsoncxx/stdx/string_view.hpp>
diff --git a/src/bsoncxx/oid.hpp b/src/bsoncxx/oid.hpp
@@ -16,7 +16,7 @@
 
 #include <bsoncxx/config/prelude.hpp>
 
-#include <iostream>
+#include <iosfwd>
 #include <ctime>
 #include <string>
 
diff --git a/src/bsoncxx/types/value.hpp b/src/bsoncxx/types/value.hpp
@@ -18,8 +18,6 @@
 
 #include <cstddef>
 #include <cstdint>
-#include <iostream>
-#include <iterator>
 #include <type_traits>
 
 #include <bsoncxx/types.hpp>
