further simplifications of error reporting code

[SVN r8315]

init_function.cpp

@@ -33,24 +33,4 @@ namespace python { namespace detail {
       return none();
   }
 
-string init::description_as_string() const
-{
-    tuple arguments(ref(this->description()));
-    string result("(");
-    for (std::size_t i = 1; i < arguments.size(); ++i)
-    {
-        if (i != 1)
-            result += ", ";
-        result += string(arguments[i]);
-    }
-
-    result += ")";
-    return result;
-}
-
-string init::argument_types_as_string(tuple arguments) const
-{
-    return argument_tuple_as_string(arguments.slice(1,arguments.size()));
-}
-
 }} // namespace python::detail