LU-16796 libcfs: Remove unsed LASSERT_ATOMIC_* macros

LU-16796 libcfs: Remove unsed LASSERT_ATOMIC_* macros

This is the first up series of patchs which
replaces atomic_t with refcount_t

This patch removes unused LASSERT_ATOMIC_* macros.
There are still:
	LASSERT_ATOMIC_GT
	LASSERT_ATOMIC_GT_LT
	LASSERT_ATOMIC_ZERO
	LASSERT_ATOMIC_POS
macros being used which will be subsequently removed
in following patches. This helps in breaking up patch
logically as changes are large.

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Change-Id: I5c41f978d10b193365ffba6ebeca9aab2cead99c
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50870
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>