Revert "add 5551 test" - does not emit an error

Author: mvorisek

tests/PHPStan/Rules/Properties/TypesAssignedToPropertiesRuleTest.php

@@ -271,11 +271,6 @@ public function testAppendendArrayKey(): void
 		]);
 	}
 
-	public function testBug5551(): void
-	{
-		$this->analyse([__DIR__ . '/data/bug-5551.php'], []);
-	}
-
 	public function testBug5372Two(): void
 	{
 		$this->analyse([__DIR__ . '/../Arrays/data/bug-5372_2.php'], []);