Removed redundant copy constructor and copy assignment.

[SVN r17043]

example/shared_ptr_example2.cpp

@@ -10,10 +10,6 @@ class example::implementation
 };
 
 example::example() : _imp( new implementation ) {}
-example::example( const example & s ) : _imp( s._imp ) {}
-
-example & example::operator=( const example & s )
-  { _imp = s._imp; return *this; }
 
 void example::do_something()
   { std::cout << "use_count() is " << _imp.use_count() << "\n"; }

example/shared_ptr_example2.hpp

@@ -14,12 +14,10 @@
 
 class example
 {
- public:
+public:
   example();
-  example( const example & );
-  example & operator=( const example & );
   void do_something();
- private:
+private:
   class implementation;
   boost::shared_ptr< implementation > _imp; // hide implementation details
 };