SPDK vhost-user-nvme target is removed from SPDK 21.07 release since
upstreamed QEMU version does not support. Fixes this usage.
Fixes#3371
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Removed all TOCs now that GitHub auto-generates them.
Also updated the documentation requirements doc removing the requirement
to add a TOC.
Fixes: #2022.
Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>