Stop running tests on AppVeyor

Debugging tests on Windows is too much work

.appveyor.yml

@@ -1,22 +0,0 @@
----
-install:
-  - sc config wuauserv start= auto
-  - net start wuauserv
-  - cinst php --version 7.3.11
-  - cinst composer ffmpeg phantomjs
-  - refreshenv
-  - copy C:\tools\php73\php.ini-development C:\tools\php73\php.ini
-  - echo extension=C:\tools\php73\ext\php_gmp.dll >> C:\tools\php73\php.ini
-  - echo extension=C:\tools\php73\ext\php_gettext.dll >> C:\tools\php73\php.ini
-  - echo extension=C:\tools\php73\ext\php_intl.dll >> C:\tools\php73\php.ini
-  - echo extension=C:\tools\php73\ext\php_openssl.dll >> C:\tools\php73\php.ini
-  - echo extension=C:\tools\php73\ext\php_mbstring.dll >> C:\tools\php73\php.ini
-  - echo extension=C:\tools\php73\ext\php_xsl.dll >> C:\tools\php73\php.ini
-  - composer install --no-dev --no-progress
-  - composer global require phpunit/phpunit:^8.4 --no-progress
-  - C:\Python36\python.exe -m pip install youtube-dl
-
-test_script:
-  - phpunit
-
-build: "off"

tests/ConfigTest.php

@@ -118,12 +118,6 @@ class ConfigTest extends BaseTest
      */
     public function testSetOptionsWithoutUpdate()
     {
-        if (getenv('APPVEYOR')) {
-            $this->markTestSkipped(
-                "This will fail on AppVeyor because it won't be able to find youtube-dl at the defaut path."
-            );
-        }
-
         Config::setOptions(['appName' => 'foo'], false);
         $config = Config::getInstance();
         $this->assertEquals($config->appName, 'foo');