git: openjdk/jdk-sandbox: jep486: Remove static variable `DEFAULT_POLICY` and unused imports.

[duke]

Changeset: d991534c
Branch: jep486
Author:    Sean Mullan <sean.mullan at oracle.com>
Date:      2024-10-23 18:03:10 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/d991534c0a8aa6a0130942f9d09f1a3954bf15bd

Remove static variable `DEFAULT_POLICY` and unused imports.

! test/jdk/java/lang/invoke/callerSensitive/csm/jdk/test/MethodInvokeTest.java