CI - delete appveyor windows build

No idea how caching works over there...
https://ci.appveyor.com/project/zdenekdrahos/phpqa/builds/52243899

Probably not necessary since Windows Subsystem for Linux

Author: zdenekdrahos

CHANGELOG.md

@@ -12,7 +12,7 @@
 * _internal (CI)_
   * ignore twig security error in old php versions - [#254](https://github.com/EdgedesignCZ/phpqa/pull/254)
   * delete composer.lock, add php 8.2, 8.3, 8.4 - [#257](https://github.com/EdgedesignCZ/phpqa/pull/257), [#265](https://github.com/EdgedesignCZ/phpqa/pull/265)
-  * update appveyor (windows test) - [#268](https://github.com/EdgedesignCZ/phpqa/pull/268)
+  * try to upgrade, then delete flaky appveyor - [#268](https://github.com/EdgedesignCZ/phpqa/pull/268), [#269](https://github.com/EdgedesignCZ/phpqa/pull/269)
 
 ## v1.26.2
 

README.md

@@ -7,7 +7,6 @@ Analyze PHP code with one command.
 [![Latest Stable Version](https://poser.pugx.org/edgedesign/phpqa/v/stable)](/CHANGELOG.md)
 [![Total Downloads](https://poser.pugx.org/edgedesign/phpqa/downloads)](https://packagist.org/packages/edgedesign/phpqa)
 [![Build Status](https://github.com/EdgedesignCZ/phpqa/workflows/PHPQA%20CI/badge.svg?branch=master)](https://github.com/EdgedesignCZ/phpqa/actions)
-[![Windows status](https://ci.appveyor.com/api/projects/status/t9f05uk4cjcg294o?svg=true&passingText=Windows)](https://ci.appveyor.com/project/zdenekdrahos/phpqa)
 
 ## Requirements