Revert "OpenJDK 11: Merging in java.lang.ref.Cleaner"

This reverts commit b4328130f66cd6c0a58145442038824f6f5f6226.

Reason for revert: broken build b/209792029

Change-Id: Ifa3130ef8104f5ef24e3eb939c50f9edc69695e8
16 files changed