git: openjdk/jdk: 8251861: Remove unused jdk.internal.ref.SoftCleanable and WeakCleanable

[Sean Coffey]

Changeset: ba24f963
Author:    Kiran Sidhartha Ravikumar <kravikumar at openjdk.org>
Committer: Sean Coffey <coffeys at openjdk.org>
Date:      2020-10-13 17:08:47 +0000
URL:       https://git.openjdk.java.net/jdk/commit/ba24f963

8251861: Remove unused jdk.internal.ref.SoftCleanable and WeakCleanable

Reviewed-by: mchung, rriggs

! src/java.base/share/classes/jdk/internal/ref/CleanerImpl.java
- src/java.base/share/classes/jdk/internal/ref/SoftCleanable.java
- src/java.base/share/classes/jdk/internal/ref/WeakCleanable.java
! test/jdk/java/lang/ref/CleanerTest.java