Bash ramdisk is long deprecated already, but its options are still
passed over as kernel parameters in boot config templates.
This patch removes all options that are no longer used by IPA-based
ramdisk. List of removed kernel parameters:
- deployment_id, deployment_key, ironic_api_url, iscsi_target_iqn:
used only in bash ramdisk
- boot_option, boot_mode, disk:
now are either auto-discovered by IPA or fetched from node
- root_device:
passing root device hints to IPA as kernel parameter was deprecated
in Newton. With this change, usage of root device hints with ramdisks
containing IPA of Mitaka release or older will not be possible.
Change-Id: I5e434bf0cc7819cf003c29f01e822a8fbde034c8
Closes-Bug: #1630799