s390/dasd: remove unused DASD EER defines

Remove definitions that have never been used.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Link: https://lore.kernel.org/r/20230405142017.2446986-2-sth@linux.ibm.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>