remove long broken SCSI to NVMe translations

[Christoph Hellwig]

On Fri, Jun 16, 2017 at 09:57:16AM -0400, Linda Knippers wrote:
> > Everything that could be done using the scsi emulation can be trivially
> > done using nvme-cli, as they should have done from day 0.
> 
> I don't quite know the history of our use of the scsi translation but I
> suspect it's because we adapted some existing utility to also support nvme.
> 
> David Milburn's patch is very simple.  Can we please fix the bug for now
> so we have a little time to fix our tools?

I don't think I want to expand usage of it.  The code only "worked"
for about two years, during which not too many NVMe products even
existed.  And I say "worked" because I found countless of sever bugs
(use after free, memory overruns, etc) issues when I first ran a SCS
I testsuite over it, which obviously didn't even cover the commands
you care about.

You might have a slightly better leaverage with distros already
shipping this code, but enabling it upstream does not seem in any
way helpful.