chore: update phpstan-baseline for PHPStan 1.9.9

Author: kenjis

phpstan-baseline.neon.dist

@@ -25,11 +25,6 @@ parameters:
 			count: 1
 			path: system/Cache/Handlers/MemcachedHandler.php
 
-		-
-			message: "#^Variable \\$data might not be defined\\.$#"
-			count: 1
-			path: system/Cache/Handlers/MemcachedHandler.php
-
 		-
 			message: "#^Property CodeIgniter\\\\Cache\\\\Handlers\\\\RedisHandler\\:\\:\\$redis \\(Redis\\) in isset\\(\\) is not nullable\\.$#"
 			count: 1