xfs: remove redundant pointer lip

mainline inclusion
from mainline-v6.1-rc1
commit fc93812c
category: bugfix
bugzilla: 189095, https://gitee.com/openeuler/kernel/issues/I76JSK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fc93812c725068e6a491ce574f058a4530130c00



--------------------------------

The assignment to pointer lip is not really required, the pointer lip
is redundant and can be removed.

Cleans up clang-scan warning:
warning: Although the value stored to 'lip' is used in the enclosing
expression, the value is never actually read from 'lip'
[deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Long Li <leo.lilong@huawei.com>