Eliminate unnecessary UFS1 integrity checks.

This was missed in the cited cherry pick.

This is a follow-on report to bug report 264450 (comments 21-33).

Reported by: slb@sonnet.com
Tested by: slb@sonnet.com
PR: 264450

(cherry picked from commit b241767f8ef38f9ca7c109fe2fccd11ccbfaa4f0)