git: openjdk/leyden: hermetic-java-runtime: Remove unneeded imports. Noticed by manc@, thanks.

[duke]

Changeset: 5a572837
Author:    Jiangli Zhou <jianglizhou at google.com>
Date:      2024-03-06 17:41:14 +0000
URL:       https://git.openjdk.org/leyden/commit/5a57283706eefca1f1d2cce06717217500168945

Remove unneeded imports. Noticed by manc@, thanks.

! src/java.base/share/classes/sun/security/util/UntrustedCertificates.java