Revert "Update versions for PHP 8.0.21"

This reverts commit 6eedacdf15.

ext/xmlreader/php_xmlreader.stub.php

@@ -1,81 +0,0 @@
-<?php
-
-/** @generate-function-entries */
-
-class XMLReader
-{
-    /** @return bool */
-    public function close() {}
-
-    /** @return string|null */
-    public function getAttribute(string $name) {}
-
-    /** @return string|null */
-    public function getAttributeNo(int $index) {}
-
-    /** @return string|null */
-    public function getAttributeNs(string $name, string $namespace) {}
-
-    /** @return bool */
-    public function getParserProperty(int $property) {}
-
-    /** @return bool */
-    public function isValid() {}
-
-    /** @return string|null */
-    public function lookupNamespace(string $prefix) {}
-
-    /** @return bool */
-    public function moveToAttribute(string $name) {}
-
-    /** @return bool */
-    public function moveToAttributeNo(int $index) {}
-
-    /** @return bool */
-    public function moveToAttributeNs(string $name, string $namespace) {}
-
-    /** @return bool */
-    public function moveToElement() {}
-
-    /** @return bool */
-    public function moveToFirstAttribute() {}
-
-    /** @return bool */
-    public function moveToNextAttribute() {}
-
-    /** @return bool */
-    public function read() {}
-
-    /** @return bool */
-    public function next(?string $name = null) {}
-
-    /** @return bool|XMLReader */
-    public static function open(string $uri, ?string $encoding = null, int $flags = 0) {}
-
-    /** @return string */
-    public function readInnerXml() {}
-
-    /** @return string */
-    public function readOuterXml() {}
-
-    /** @return string */
-    public function readString() {}
-
-    /** @return bool */
-    public function setSchema(?string $filename) {}
-
-    /** @return bool */
-    public function setParserProperty(int $property, bool $value) {}
-
-    /** @return bool */
-    public function setRelaxNGSchema(?string $filename) {}
-
-    /** @return bool */
-    public function setRelaxNGSchemaSource(?string $source) {}
-
-    /** @return bool|XMLReader */
-    public static function XML(string $source, ?string $encoding = null, int $flags = 0) {}
-
-    /** @return DOMNode|false */
-    public function expand(?DOMNode $baseNode = null) {}
-}