how to remove EFS in linux rhel6 ?

#umount /crpt

#vim /etc/fstab

delete entry

:wq! (save n quit)

#mount -a

#vim /dev/crypttab

delete the entry

:wq!

#cryptsetup luksClose /dev/mapper/storage

#cryptsetup luksRemoveKey /dev/sda5 /root/key

#rm -rf key

#ll /dev/mapper

fdisk /dev/sda

delete the partition

#partx -a /dev/sda (run 2 times.)