aio02: remove test for IO_fsync() and IO_fdsync()

Linux filesystems doesn't support IO_fsync() and IO_fdsync()
operations, so just remove test for these two.

Reviewed-by: Jan Stancek <jstancek@redhat.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>