LU-9625 utils: remove old lfs "cp" and "ls" sub-commands

LU-9625 utils: remove old lfs "cp" and "ls" sub-commands

Remove the obsolete "lfs cp" and "lfs ls" sub-commands for handling
"remote" users in a different namespace.  They have been non-working
since commit v2_8_54_0-73-g9d06de3 and were never in use before that.

Instead we have nodemap to handle UID/GID mapping.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I8db90d388f8fa621d61fc65ab677b1589b3ebbe5
Reviewed-on: https://review.whamcloud.com/34240
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Nikitas Angelinas <nangelinas@cray.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>