Use nsrt/bug-9634 in MethodConditionalReturnTypeRuleTest and delete duplicate data file

The rule test now references tests/PHPStan/Analyser/nsrt/bug-9634.php
instead of maintaining a separate duplicate in tests/PHPStan/Rules/PhpDoc/data/.

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

Author: phpstan-bot

tests/PHPStan/Rules/PhpDoc/MethodConditionalReturnTypeRuleTest.php

@@ -104,7 +104,12 @@ public function testBug11939(): void
 
 	public function testBug9634(): void
 	{
-		$this->analyse([__DIR__ . '/data/bug-9634.php'], []);
+		$this->analyse([__DIR__ . '/../../Analyser/nsrt/bug-9634.php'], []);
+	}
+
+	public function testBug10938(): void
+	{
+		$this->analyse([__DIR__ . '/../../Analyser/nsrt/bug-10938.php'], []);
 	}
 
 }