Drush acsf-uninstall does not revert the htaccess file

The drush command acsf-init invokes the patchHtaccess() which alter the root .htaccess file to add the following line:

  # ACSF requirement: allow access to apc_rebuild.php.
  RewriteCond %{REQUEST_URI} !/sites/g/apc_rebuild.php$

right before the following line:

  RewriteRule "^(.+/.*|autoload)\.php($|/)" - [F]

When executing drush acsf-uninstall command, it does not revert the change in the .htaccess file.