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diff --git a/vendor/psy/psysh/src/Psy/CodeCleaner/InstanceOfPass.php b/vendor/psy/psysh/src/Psy/CodeCleaner/InstanceOfPass.php
deleted file mode 100644
index 78ce98e93..000000000
--- a/vendor/psy/psysh/src/Psy/CodeCleaner/InstanceOfPass.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-/*
- * This file is part of Psy Shell.
- *
- * (c) 2012-2017 Justin Hileman
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Psy\CodeCleaner;
-
-use PhpParser\Node;
-use PhpParser\Node\Expr\ConstFetch;
-use PhpParser\Node\Expr\Instanceof_;
-use PhpParser\Node\Scalar;
-use PhpParser\Node\Scalar\Encapsed;
-use Psy\Exception\FatalErrorException;
-
-/**
- * Validate that the instanceof statement does not receive a scalar value or a non-class constant.
- *
- * @author Martin Hasoň <martin.hason@gmail.com>
- */
-class InstanceOfPass extends CodeCleanerPass
-{
-    const EXCEPTION_MSG = 'instanceof expects an object instance, constant given';
-
-    /**
-     * Validate that the instanceof statement does not receive a scalar value or a non-class constant.
-     *
-     * @throws FatalErrorException if a scalar or a non-class constant is given
-     *
-     * @param Node $node
-     */
-    public function enterNode(Node $node)
-    {
-        if (!$node instanceof Instanceof_) {
-            return;
-        }
-
-        if (($node->expr instanceof Scalar && !$node->expr instanceof Encapsed) || $node->expr instanceof ConstFetch) {
-            throw new FatalErrorException(self::EXCEPTION_MSG, 0, E_ERROR, null, $node->getLine());
-        }
-    }
-}