LU-6142 fld: remove fci_no_shrink field.

LU-6142 fld: remove fci_no_shrink field.

This field is never set, so is always zero.
Remove it, and the one place where it is tested.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.com>
Change-Id: I4e576cc1984e0fac829a65c6b53d6ddac0d0ee88
Reviewed-on: https://review.whamcloud.com/35875
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Arshad Hussain <arshad.super@gmail.com>