immutable feature not needed anymore. private assign is recognized by swig now

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@6445 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Lib/std/std_ios.i

@@ -146,6 +146,12 @@ namespace std {
   protected:
     ios_base();
 
+  //50.  Copy constructor and assignment operator of ios_base
+  private:
+    ios_base(const ios_base&);
+
+    ios_base& 
+    operator=(const ios_base&);
   };
 
   template<typename _CharT, typename _Traits >

SWIG/Lib/std/std_iostream.i

@@ -6,18 +6,6 @@
 #include <iostream>
 %}
 
-namespace std 
-{
-  %feature("immutable") cin;
-  %feature("immutable") cout;
-  %feature("immutable") cerr;
-  %feature("immutable") clog;
-  
-  %feature("immutable") wcin;
-  %feature("immutable") wcout;
-  %feature("immutable") wcerr;
-  %feature("immutable") wclog;
-}
 
 namespace std
 {