LU-16518 llite: fix unused-but-set-variable warnings

LU-16518 llite: fix unused-but-set-variable warnings

Remove unused variables in llite. Clang does not like
this, so disard them.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Icb555135fc5ee53c2a7b2819beed4a78fe89b91d
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58178
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Max Wang <wamax@amazon.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>