Remove dead FIO_FILE_EXISTS flag

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/filesetup.c b/filesetup.c
index 76b45a9..785afce 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -33,7 +33,7 @@
 	if (td_write(td) && !td->o.overwrite)
 		unlink_file = 1;
 
-	if ((unlink_file || new_layout) && (f->flags & FIO_FILE_EXISTS)) {
+	if (unlink_file || new_layout) {
 		if (unlink(f->file_name) < 0) {
 			td_verror(td, errno, "unlink");
 			return 1;