Including files in Child Themes

get_template_directory looks in the parent theme for files.

In the case a child theme is being used, the absolute path to the
parent theme directory will be returned. Use
get_stylesheet_directory() to get the absolute path to the child theme
directory.

http://codex.wordpress.org/Function_Reference/get_template_directory

This file is not meant to be replaced. You will need to find another way to do what you need to do.

Perhaps remove the function hooked here and add your own?