Revert "Support for storage space data disks"

[ambarve]

Reverts #998

Not sure how this got merged. I must have merged this by mistake while trying to merge the other PR #1021

[ambarve]

I am pretty sure I never merged this PR and there is no need to revert it. When I was making changes for #1021 I made them on the same branch (storage_spaces) by rebasing it locally and then I pushed the new commit to a new branch (scsi_vsmb_fix) and also pushed this (storage_spaces) branch and changed this PR to draft because I still wanted to push new changes here. However, it looks like github automatically changed the status of this PR from draft to merged when I merged #1021 because both of these branches have the same commit at top. The diff of this merged PR only shows changes that are exactly the same as #1021 so there is no need to revert anything.

I guess if I push new changes to storage_spaces branch then github might automatically change the status of that PR back to open or if not I can open another PR.