HookReplaceCommandInterface.php does not exist

[JDDoesDev]

Steps to reproduce

Read the documentation and clicked on the link to HookReplaceCommandInterface.php

Expected behavior

The file should have opened for viewing and reference

Actual behavior

404

The Acquia BLT docs for replacing a command point to the section of the README with a short example and a link to the interface to reference. This file apparently does not exist anymore. This makes it difficult to know what to do in order to replace a command or if that is even still an option.