RFR: 8342082: Remove unused BasicProgressBarUI.Animator.interval [v2]

[Andrey Turbanov]

> The field `javax.swing.plaf.basic.BasicProgressBarUI.Animator.interval` is unused and can be removed.

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

  8342082: Remove unused BasicProgressBarUI.Animator.interval
  
  adjust comment too

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21132/files
  - new: https://git.openjdk.org/jdk/pull/21132/files/092f827a..d93b287d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21132&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21132&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/21132.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21132/head:pull/21132

PR: https://git.openjdk.org/jdk/pull/21132