diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index bc2ee2d8..25795537 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3768,32 +3768,4 @@ class Net_SSH2
         }
         return $this->exit_status;
     }
-
-    /**
-     * Is a path includable?
-     *
-     * @return Boolean
-     * @access private
-     */
-    function _is_includable($suffix)
-    {
-        // stream_resolve_include_path was introduced in PHP 5.3.2
-        if (function_exists('stream_resolve_include_path')) {
-            return stream_resolve_include_path($suffix) !== false;
-        }
-
-        $paths = PATH_SEPARATOR == ':' ?
-            preg_split('#(?<!phar):#', get_include_path()) :
-            explode(PATH_SEPARATOR, get_include_path());
-        foreach ($paths as $prefix) {
-            $ds = substr($prefix, -1) == DIRECTORY_SEPARATOR ? '' : DIRECTORY_SEPARATOR;
-            $file = $prefix . $ds . $suffix;
-
-            if (file_exists($file)) {
-                return true;
-            }
-        }
-
-        return false;
-    }
 }