remove not needed code

alib2std/src/extensions/utility.hpp

@@ -90,14 +90,9 @@ struct rvalue_ref {
 	}
 };
-template < class T >
-inline rvalue_ref < T > manage_move ( T * param ) {
-	return rvalue_ref < T > { param };
-}
-
 template < class T, typename std::enable_if < ext::has_clone < T >::value >::type * = nullptr >
 inline rvalue_ref < T > move_copy ( const T & param ) {
-	return manage_move ( param.clone ( ) );
+	return rvalue_ref < T > { param.clone ( ) };
 }
  // TODO remove after switching to c++17 (as_const)