Issue #3272770: Replace deprecated assertFileNotExists() with assertFileDoesNotExist()

tests/src/Functional/FillPdfUploadTestBase.php

@@ -130,7 +130,7 @@ abstract class FillPdfUploadTestBase extends FillPdfTestBase {
         // Now remove the PDF file again. The temporary file should now be
         // removed both from the disk and the database.
         $this->drupalPostForm(NULL, NULL, self::OP_REMOVE);
-        $this->assertFileNotExists($new_file->getFileUri());
+        $this->assertFileDoesNotExist($new_file->getFileUri());
         // @todo Simplify once Core bug gets fixed.
         // @see https://www.drupal.org/project/drupal/issues/3043127
         $this->assertFileEntryNotExists($new_file, NULL);