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diff --git a/vendor/psy/psysh/src/Psy/Output/ProcOutputPager.php b/vendor/psy/psysh/src/Psy/Output/ProcOutputPager.php
deleted file mode 100644
index bb41c6cc9..000000000
--- a/vendor/psy/psysh/src/Psy/Output/ProcOutputPager.php
+++ /dev/null
@@ -1,103 +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\Output;
-
-use Symfony\Component\Console\Output\StreamOutput;
-
-/**
- * ProcOutputPager class.
- *
- * A ProcOutputPager instance wraps a regular StreamOutput's stream. Rather
- * than writing directly to the stream, it shells out to a pager process and
- * gives that process the stream as stdout. This means regular *nix commands
- * like `less` and `more` can be used to page large amounts of output.
- */
-class ProcOutputPager extends StreamOutput implements OutputPager
-{
-    private $proc;
-    private $pipe;
-    private $stream;
-    private $cmd;
-
-    /**
-     * Constructor.
-     *
-     * @param StreamOutput $output
-     * @param string       $cmd    Pager process command (default: 'less -R -S -F -X')
-     */
-    public function __construct(StreamOutput $output, $cmd = 'less -R -S -F -X')
-    {
-        $this->stream = $output->getStream();
-        $this->cmd    = $cmd;
-    }
-
-    /**
-     * Writes a message to the output.
-     *
-     * @param string $message A message to write to the output
-     * @param bool   $newline Whether to add a newline or not
-     *
-     * @throws \RuntimeException When unable to write output (should never happen)
-     */
-    public function doWrite($message, $newline)
-    {
-        $pipe = $this->getPipe();
-        if (false === @fwrite($pipe, $message . ($newline ? PHP_EOL : ''))) {
-            // @codeCoverageIgnoreStart
-            // should never happen
-            throw new \RuntimeException('Unable to write output.');
-            // @codeCoverageIgnoreEnd
-        }
-
-        fflush($pipe);
-    }
-
-    /**
-     * Close the current pager process.
-     */
-    public function close()
-    {
-        if (isset($this->pipe)) {
-            fclose($this->pipe);
-        }
-
-        if (isset($this->proc)) {
-            $exit = proc_close($this->proc);
-            if ($exit !== 0) {
-                throw new \RuntimeException('Error closing output stream');
-            }
-        }
-
-        unset($this->pipe, $this->proc);
-    }
-
-    /**
-     * Get a pipe for paging output.
-     *
-     * If no active pager process exists, fork one and return its input pipe.
-     */
-    private function getPipe()
-    {
-        if (!isset($this->pipe) || !isset($this->proc)) {
-            $desc = array(array('pipe', 'r'), $this->stream, fopen('php://stderr', 'w'));
-            $this->proc = proc_open($this->cmd, $desc, $pipes);
-
-            if (!is_resource($this->proc)) {
-                throw new \RuntimeException('Error opening output stream');
-            }
-
-            $this->pipe = $pipes[0];
-        }
-
-        return $this->pipe;
-    }
-}