diff --git a/src/Chip/Chip.php b/src/Chip/Chip.php
index 7fe9c86..2be38a6 100644
--- a/src/Chip/Chip.php
+++ b/src/Chip/Chip.php
@@ -12,8 +12,6 @@
 use \PhpParser\ParserFactory;
 use \PhpParser\NodeTraverser;
 
-stream_wrapper_register(MemoryStreamWrapper::WRAPPER_NAME, MemoryStreamWrapper::class);
-
 class Chip
 {
     /**
diff --git a/src/Chip/MemoryStreamWrapper.php b/src/Chip/MemoryStreamWrapper.php
deleted file mode 100644
index 45f4737..0000000
--- a/src/Chip/MemoryStreamWrapper.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-/**
- * Created by PhpStorm.
- * User: phithon
- * Date: 2019/1/13
- * Time: 3:40
- */
-
-namespace Chip;
-
-// phpcs:disable PSR1.Methods.CamelCapsMethodName
-class MemoryStreamWrapper
-{
-    const WRAPPER_NAME = 'string';
-
-    private $_content = '';
-
-    private $_position;
-
-    public function stream_open($path, $mode, $options, &$opened_path)
-    {
-        $this->_position = 0;
-        $this->_content = substr($path, strlen(self::WRAPPER_NAME) + 3);
-        return true;
-    }
-
-    public function stream_read($count)
-    {
-        $ret = substr($this->_content, $this->_position, $count);
-        $this->_position += strlen($ret);
-        return $ret;
-    }
-
-    public function stream_stat()
-    {
-        return array();
-    }
-
-    public function stream_eof()
-    {
-        return $this->_position >= strlen($this->_content);
-    }
-}
-// phpcs:enable