chore: igonre 'php'

I don't know why this is needed.

Author: kenjis

composer-unused.php

@@ -4,10 +4,9 @@
 
 use ComposerUnused\ComposerUnused\Configuration\Configuration;
 use ComposerUnused\ComposerUnused\Configuration\NamedFilter;
-use ComposerUnused\ComposerUnused\Configuration\PatternFilter;
-use Webmozart\Glob\Glob;
 
 return static function (Configuration $config): Configuration {
     return $config
-        ->addNamedFilter(NamedFilter::fromString('codeigniter4/framework'));
+        ->addNamedFilter(NamedFilter::fromString('codeigniter4/framework'))
+        ->addNamedFilter(NamedFilter::fromString('php'));
 };