Remove removeListener() methods. They are not called. -------------
Commit messages: - Remove removeListener() method. Changes: https://git.openjdk.org/jdk/pull/12151/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12151&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8300810 Stats: 26 lines in 2 files changed: 0 ins; 24 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/12151.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12151/head:pull/12151 PR: https://git.openjdk.org/jdk/pull/12151
