Update

core/bitrix/modules/main/cli/bitrix.php

@@ -17,48 +17,6 @@
 // include bitrix
 require_once 'bootstrap.php';
 
-// default location of composer.json
-$composerJsonFile = $_SERVER["DOCUMENT_ROOT"].'/bitrix/composer.json';
-
-// custom location of composer.json from .settings.php
-$composerSettings = \Bitrix\Main\Config\Configuration::getValue('composer');
-if (!empty($composerSettings['config_path']))
-{
-	$jsonPath = $composerSettings['config_path'];
-	$jsonPath = ($jsonPath[0] == '/')
-		? $jsonPath // absolute
-		: realpath($_SERVER["DOCUMENT_ROOT"].'/'.$jsonPath); // relative
-
-	if (!empty($jsonPath))
-	{
-		$composerJsonFile = $jsonPath;
-	}
-}
-
-// default vendor path has the same parent dir as composer.json has
-$vendorPath = dirname($composerJsonFile).'/vendor';
-
-if (file_exists($composerJsonFile) && is_readable($composerJsonFile))
-{
-	$jsonContent = json_decode(file_get_contents($composerJsonFile), true);
-
-	if (isset($jsonContent['config']['vendor-dir']))
-	{
-		$vendorPath = realpath(dirname($composerJsonFile).DIRECTORY_SEPARATOR.$jsonContent['config']['vendor-dir']);
-
-		if ($vendorPath === false)
-		{
-			throw new \Bitrix\Main\SystemException(sprintf(
-				'Failed to load vendor libs from %s, path \'%s\' is not readable',
-				$composerJsonFile, $jsonContent['config']['vendor-dir']
-			));
-		}
-	}
-}
-
-// include composer autoload
-require $vendorPath.'/autoload.php';
-
 // initialize symfony
 use Symfony\Component\Console\Application;