Remove unneeded iostream includes

It cause adding new entry to executable init array for each translation unit.

Change-Id: I1e2d7946da03c001de7721948bc9af8188e8b317
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3981
Reviewed-by: X512 <danger_mail@list.ru>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

headers/private/netservices/HttpResult.h

@@ -6,8 +6,6 @@
 #define _B_HTTP_RESULT_H_
 
 
-#include <iostream>
-
 #include <HttpHeaders.h>
 #include <String.h>
 #include <Url.h>

src/kits/interface/ColorControl.cpp

@@ -19,8 +19,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <iostream>
-
 #include <ControlLook.h>
 #include <Bitmap.h>
 #include <TextControl.h>

src/kits/network/libnetservices/HttpResult.cpp

@@ -13,8 +13,6 @@
 #include <Debug.h>
 
 
-using std::ostream;
-
 #ifndef LIBNETAPI_DEPRECATED
 using namespace BPrivate::Network;
 #endif

src/kits/network/libnetservices/UrlProtocolListener.cpp

@@ -7,7 +7,6 @@
  *		Adrien Destugues, pulkomandy@pulkomandy.tk
  */
 
-#include <iostream>
 #include <cstdio>
 
 #include <UrlRequest.h>

src/kits/storage/mime/Database.cpp

@@ -14,7 +14,6 @@
 #include <stdio.h>
 #include <string>
 
-#include <iostream>
 #include <new>
 
 #include <Application.h>

src/kits/storage/mime/SupportingApps.cpp

@@ -14,7 +14,6 @@
 #include <stdio.h>
 
 #include <new>
-#include <iostream>
 
 #include <Directory.h>
 #include <Message.h>