Remove always true/false occurrences

Author: alexandre-daubois

Tests/Constraints/CallbackValidatorTest.php

@@ -246,7 +246,6 @@ public function testPayloadIsPassedToCallback()
         $constraint = new Callback(callback: $callback, payload: 'Hello world!');
         $this->validator->validate($object, $constraint);
         $this->assertEquals('Hello world!', $payloadCopy);
-        $payloadCopy = 'Replace me!';
 
         $payloadCopy = 'Replace me!';
         $constraint = new Callback([