diff --git a/defaults/README.md b/defaults/README.md
index 43a70f28..0fef1430 100644
--- a/defaults/README.md
+++ b/defaults/README.md
@@ -4,5 +4,4 @@
 |---|---|
 | `artifact/` | Default files used in build artifacts. Override these by editing the `artifact.gitignore_template` and `artifact.readme_template` in your project's properties. |
 | `install/` | Templates used when installing the-build into a project. |
-| `install_site/` | Templates used when adding a multisite to a project with the `phing drupal-add-multisite` command. |
 | `standard/` | Configuration files and a module that are referenced directly by the-build. |
diff --git a/defaults/install_site/drupal/settings.acquia.php b/defaults/install_site/drupal/settings.acquia.php
deleted file mode 100644
index 0bf60ccd..00000000
--- a/defaults/install_site/drupal/settings.acquia.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-/**
- * @file
- * Drupal settings file for use with Acquia hosted sites.
- *
- * This file should be loaded on all environments, Acquia or not, since the settings here
- * will affect the behavior of the site.
- */
-
-$config['acquia_connector.settings']['hide_signup_messages'] = TRUE;
-
-$settings['cache']['default'] = 'cache.backend.database';
-
-// Include the Acquia database connection and other config.
-if (file_exists('/var/www/site-php')) {
-  require "/var/www/site-php/{$_ENV['AH_SITE_GROUP']}/{$_ENV['AH_SITE_GROUP']}-settings.inc";
-}
diff --git a/defaults/install_site/drupal/settings.php b/defaults/install_site/drupal/settings.php
deleted file mode 100644
index cb81013c..00000000
--- a/defaults/install_site/drupal/settings.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-/**
- * @file
- * Drupal's main configuration file.
- *
- * To customize the configuration:
- * - Create a settings.local.php
- * - Edit the templates at .the-build/drupal/settings.*.php
- * - Avoid editing this file
- *
- * @see https://api.drupal.org/api/drupal/sites%21default%21default.settings.php/8.6.x
- */
-
-
-// This is the core set of defaults from default.settings.php. They will be overridden
-// as necessary by the includes below.
-$settings['hash_salt'] = '';
-$settings['update_free_access'] = FALSE;
-$settings['container_yamls'][] = $app_root . '/' . $site_path . '/services.yml';
-$settings['file_scan_ignore_directories'] = [
-  'node_modules',
-  'bower_components',
-];
-$settings['entity_update_batch_size'] = 50;
-
-
-// Disable our three default config_split configurations. These will be enabled in the
-// settings.build.php file that is compiled for either development or for the artifact.
-$config['config_split.config_split.production']['status'] = FALSE;
-$config['config_split.config_split.staging']['status'] = FALSE;
-$config['config_split.config_split.development']['status'] = FALSE;
-
-
-// Additional settings files to load. Order is significant.
-$settings_filenames = [
-  // Host-specific settings.
-  'settings.${build.host}.php',
-  // Settings file generated by palantirnet/the-build
-  'settings.build.php',
-  // Local settings file for use on individual developer environments
-  'settings.local.php',
-];
-
-// Load each settings file that is present, in the order specified above.
-foreach ($settings_filenames as $settings_filename) {
-  $settings_file = "{$app_root}/{$site_path}/{$settings_filename}";
-  if (file_exists($settings_file)) {
-    include $settings_file;
-  }
-}