chore: Move clean script off gulp

packages/blockly/gulpfile.mjs

@@ -16,7 +16,6 @@
 //
 // organize-imports-ignore
 
-import {parallel} from 'gulp';
 import {
   deployDemos,
   deployDemosBeta,
@@ -27,9 +26,6 @@ import {
   buildAdvancedCompilationTest,
   minify,
 } from './scripts/gulpfiles/build_tasks.mjs';
-import {cleanBuildDir, cleanReleaseDir} from './scripts/lib/fs_utils.mjs';
-
-const clean = parallel(cleanBuildDir, cleanReleaseDir);
 
 // Default target if gulp invoked without specifying.
 export default build;
@@ -52,6 +48,5 @@ export {
 //
 // prettier-ignore
 export {
-  clean,
   buildAdvancedCompilationTest,
 }

packages/blockly/package.json

@@ -99,7 +99,7 @@
     "build-debug-log": "npm run build:debug > build-debug.log 2>&1 && tail -3 build-debug.log",
     "build-strict": "gulp build --verbose --strict",
     "build-strict-log": "npm run build:strict > build-debug.log 2>&1 && tail -3 build-debug.log",
-    "clean": "gulp clean",
+    "clean": "node \"scripts/clean.mjs\"",
     "deployDemos": "npm ci && gulp deployDemos",
     "deployDemos:beta": "npm ci && gulp deployDemosBeta",
     "messages": "node \"scripts/messages.mjs\"",

packages/blockly/scripts/clean.mjs

@@ -0,0 +1,14 @@
+/**
+ * @license
+ * Copyright 2026 Raspberry Pi Foundation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @fileoverview Script to clean the workspace of old build/package/etc. files.
+ */
+
+import {cleanBuildDir, cleanReleaseDir} from './lib/fs_utils.mjs';
+
+await cleanBuildDir();
+await cleanReleaseDir();