Update helpers.php

- Passing null to non-nullable internal function parameters is deprecated in PHP 8.1

src/helpers.php

@@ -12,15 +12,7 @@
      *                          attached. Upon failure, file_lines() returns false.
      */
     function file_lines($filename, $flags = 0) {
-        $autoDetectEndings = ini_get('auto_detect_line_endings');
-
-        ini_set('auto_detect_line_endings', '1');
-
-        $lines = file($filename, $flags);
-
-        ini_set('auto_detect_line_endings', $autoDetectEndings);
-
-        return $lines;
+        return file($filename, $flags);
     }
 }