diff --git a/src/flextype/preflight.php b/src/flextype/preflight.php
deleted file mode 100644
index 7f19a4baa..000000000
--- a/src/flextype/preflight.php
+++ /dev/null
@@ -1,71 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-use Symfony\Component\Yaml\Yaml as SymfonyYaml;
-
-$flextypeManifestFilePath        = ROOT_DIR . '/src/flextype/flextype.yaml';
-$defaultFlextypeSettingsFilePath = ROOT_DIR . '/src/flextype/settings.yaml';
-$customFlextypeSettingsFilePath  = PATH['project'] . '/config/flextype/settings.yaml';
-$preflightFlextypePath           = PATH['tmp'] . '/preflight/flextype/';
-$customFlextypeSettingsPath      = PATH['project'] . '/config/flextype/';
-
-! filesystem()->directory($preflightFlextypePath)->exists() and filesystem()->directory($preflightFlextypePath)->create(0755, true);
-! filesystem()->directory($customFlextypeSettingsPath)->exists() and filesystem()->directory($customFlextypeSettingsPath)->create(0755, true);
-
-$f1 = file_exists($flextypeManifestFilePath) ? filemtime($flextypeManifestFilePath) : '';
-$f2 = file_exists($defaultFlextypeSettingsFilePath) ? filemtime($defaultFlextypeSettingsFilePath) : '';
-$f3 = file_exists($customFlextypeSettingsFilePath) ? filemtime($customFlextypeSettingsFilePath) : '';
-
-// Create Unique Cache ID
-$cacheID = md5($flextypeManifestFilePath . $defaultFlextypeSettingsFilePath . $customFlextypeSettingsFilePath . $f1 . $f2 . $f3);
-
-if (filesystem()->file($preflightFlextypePath . '/' . $cacheID . '.txt')->exists()) {
-    $flextypeData = unserialize(filesystem()->file($preflightFlextypePath . '/' . $cacheID . '.txt')->get());
-} else {
-    // Set settings if Flextype Default settings config files exist
-    if (! filesystem()->file($defaultFlextypeSettingsFilePath)->exists()) {
-        throw new RuntimeException('Flextype Default settings config file does not exist.');
-    }
-
-    if (($defaultFlextypeSettingsContent = filesystem()->file($defaultFlextypeSettingsFilePath)->get()) === false) {
-        throw new RuntimeException('Load file: ' . $defaultFlextypeSettingsFilePath . ' - failed!');
-    } else {
-        if (trim($defaultFlextypeSettingsContent) === '') {
-            $defaultFlextypeSettings['settings'] = [];
-        } else {
-            $defaultFlextypeSettings['settings'] = SymfonyYaml::parse($defaultFlextypeSettingsContent);
-        }
-    }
-
-    // Create flextype custom settings file
-    ! filesystem()->file($customFlextypeSettingsFilePath)->exists() and filesystem()->file($customFlextypeSettingsFilePath)->put($defaultFlextypeSettingsContent);
-
-    if (($customFlextypeSettingsContent = filesystem()->file($customFlextypeSettingsFilePath)->get()) === false) {
-        throw new RuntimeException('Load file: ' . $customFlextypeSettingsFilePath . ' - failed!');
-    } else {
-        if (trim($customFlextypeSettingsContent) === '') {
-            $customFlextypeSettings['settings'] = [];
-        } else {
-            $customFlextypeSettings['settings'] = SymfonyYaml::parse($customFlextypeSettingsContent);
-        }
-    }
-
-    if (($flextypeManifestContent = filesystem()->file($flextypeManifestFilePath)->get()) === false) {
-        throw new RuntimeException('Load file: ' . $flextypeManifestFilePath . ' - failed!');
-    } else {
-        if (trim($flextypeManifestContent) === '') {
-            $flextypeManifest['manifest'] = [];
-        } else {
-            $flextypeManifest['manifest'] = SymfonyYaml::parse($flextypeManifestContent);
-        }
-    }
-
-    // Merge flextype default settings with custom project settings.
-    $flextypeData = array_replace_recursive($defaultFlextypeSettings, $customFlextypeSettings, $flextypeManifest);
-
-    filesystem()->file($preflightFlextypePath . $cacheID . '.txt')->put(serialize($flextypeData));
-}
-
-// Store flextype merged data in the flextype registry.
-flextype()->container()->get('registry')->set('flextype', $flextypeData);