sysprep: remove /var/log/audit/audit.log

audit.log is already included in /var/log/audit/*.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
sysprep: remove log file of sysstat

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
sysprep: remove log file of gdm

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
sysprep: remove log file of ntp

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>