dm integrity: remove set but not used variables
Fixes gcc '-Wunused-but-set-variable' warning: drivers/md/dm-integrity.c: In function 'integrity_metadata': drivers/md/dm-integrity.c:1557:12: warning: variable 'save_metadata_offset' set but not used [-Wunused-but-set-variable] drivers/md/dm-integrity.c:1556:12: warning: variable 'save_metadata_block' set but not used [-Wunused-but-set-variable] They are never used, so remove it. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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