RFR: 8362067: Remove unnecessary List.contains key from SpringLayout.Constraints.pushConstraint [v2]

[Andrey Turbanov]

> There is no need to call `List.contains` before `List.remove` call.
> `history` is an either `horizontalHistory` or `verticalHistory`. Both of them are ArrayList's.

Andrey Turbanov has updated the pull request incrementally with one additional commit since the last revision:

  expand star import

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24852/files
  - new: https://git.openjdk.org/jdk/pull/24852/files/2667de76..57bb716c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24852&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24852&range=00-01

  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24852.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24852/head:pull/24852

PR: https://git.openjdk.org/jdk/pull/24852