Remove a lot of platform compatibilty stuff

It's either not used, or no longer relevant.
diff --git a/common/rdr/Exception.cxx b/common/rdr/Exception.cxx
index fd40582..d70cd9f 100644
--- a/common/rdr/Exception.cxx
+++ b/common/rdr/Exception.cxx
@@ -22,6 +22,9 @@
 #include <config.h>
 #endif
 
+#include <stdio.h>
+#include <stdarg.h>
+
 #include <rdr/Exception.h>
 #include <rdr/TLSException.h>
 #ifdef _WIN32
@@ -30,8 +33,6 @@
 #include <windows.h>
 #endif
 
-#include <os/print.h>
-
 #include <string.h>
 
 #ifdef HAVE_GNUTLS