Uncomment expected premature access errors in readonly property test

Now that uninitialized properties are correctly tracked in methods
called from constructors, premature access to readonly properties
in those methods is properly detected.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

tests/PHPStan/Rules/Properties/MissingReadOnlyPropertyAssignRuleTest.php

@@ -137,14 +137,14 @@ public function testRule(): void
 				'Readonly property MissingReadOnlyPropertyAssign\AdditionalAssignOfReadonlyPromotedProperty::$x is already assigned.',
 				188,
 			],
-			/*[
+			[
 				'Access to an uninitialized readonly property MissingReadOnlyPropertyAssign\MethodCalledFromConstructorBeforeAssign::$foo.',
 				226,
 			],
 			[
 				'Access to an uninitialized readonly property MissingReadOnlyPropertyAssign\MethodCalledTwice::$foo.',
 				244,
-			],*/
+			],
 			[
 				'Class MissingReadOnlyPropertyAssign\PropertyAssignedOnDifferentObjectUninitialized has an uninitialized readonly property $foo. Assign it in the constructor.',
 				264,