Update phpunit.xml

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: Vitexus

phpunit.xml

@@ -1,12 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit colors="true" bootstrap="./tests/bootstrap.php">
-    <php>
-        <env name="POHODA_URL" value="https://novak.proxy.spojenet.cz"/>
-        <env name="POHODA_USERNAME" value="api"/>
-        <env name="POHODA_PASSWORD" value="api"/>
-        <env name="POHODA_ICO" value="25596641"/>
-        <env name="POHODA_DEBUG" value="true"/>
-    </php>
+    <!-- Intentionally empty. Configure POHODA_* via the environment or phpunit.xml.dist -->
     <testsuites>
         <testsuite name="all">
             <directory>./tests</directory>