Fix test

Author: tommy-muehle

tests/Script/Processor/CleanUpTest.php

@@ -72,9 +72,8 @@ public function testPharFileWasRemoved()
             ->willReturn([]);
 
         $this->helper
-            ->expects($this->once())
-            ->method('getFilesystem')
-            ->willReturn(new Filesystem);
+            ->expects($this->never())
+            ->method('getFilesystem');
 
         $processor = $this->getProcessor();
         $processor->cleanUp();