<i18n dev> RFR: 8357224: Avoid redundant WeakHashMap.get in Toolkit.removeAWTEventListener

[Andrey Turbanov]

Instead of separate `.get`+`.remove` calls we can call `.remove` and then compare result with `null`

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Commit messages:
 - [PATCH] Avoid redundant WeakHashMap.get in Toolkit.removeAWTEventListener

Changes: https://git.openjdk.org/jdk/pull/24692/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24692&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357224
  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/24692.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24692/head:pull/24692

PR: https://git.openjdk.org/jdk/pull/24692