Remove broken BOOST_NO_FUNCTION_TEMPLATE_ORDERING workaround

The workaround seems to be broken for a while, no compilers with that bug are
tested/supported, and there is no complaint whatsoever, not even on trac.

include/boost/range/as_array.hpp

@@ -28,8 +28,6 @@ namespace boost
         return boost::make_iterator_range( r );
     }
 
-#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
-
     template< class Range >
     inline boost::iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type > 
     as_array( const Range& r )
@@ -37,8 +35,6 @@ namespace boost
         return boost::make_iterator_range( r );
     }
     
-#endif
-    
 }
 
 #endif