No need to detect ESM support

Author: novemberborn

lib/worker/subprocess.js

@@ -6,15 +6,6 @@ require('./ensure-forked'); // eslint-disable-line import/no-unassigned-import
 
 const ipc = require('./ipc');
 
-const supportsESM = async () => {
-	try {
-		await import('data:text/javascript,'); // eslint-disable-line node/no-unsupported-features/es-syntax
-		return true;
-	} catch {}
-
-	return false;
-};
-
 ipc.send({type: 'ready-for-options'});
 ipc.options.then(async options => {
 	require('./options').set(options);
@@ -184,23 +175,10 @@ ipc.options.then(async options => {
 	}).filter(provider => provider !== null);
 
 	let requireFn = require;
-	let isESMSupported;
 	const load = async ref => {
 		for (const extension of extensionsToLoadAsModules) {
 			if (ref.endsWith(`.${extension}`)) {
-				if (typeof isESMSupported !== 'boolean') {
-					// Lazily determine support since this prints an experimental warning.
-					// eslint-disable-next-line no-await-in-loop
-					isESMSupported = await supportsESM();
-				}
-
-				if (isESMSupported) {
-					return import(pathToFileURL(ref)); // eslint-disable-line node/no-unsupported-features/es-syntax
-				}
-
-				ipc.send({type: 'internal-error', err: serializeError('Internal runner error', false, new Error('ECMAScript Modules are not supported in this Node.js version.'))});
-				exit(1);
-				return;
+				return import(pathToFileURL(ref)); // eslint-disable-line node/no-unsupported-features/es-syntax
 			}
 		}