The variable 'internal_page_offset' is not used. Delete it.

drivers/scsi/be2iscsi/be_cmds.c:1176:6: warning: variable 'internal_page_offset' set but not used.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4011Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230209035224.90327-1-jiapeng.chong@linux.alibaba.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>