RFR: 8339524: Clean up a few ExtendedRobot tests [v9]

[Alisen Chung]

> Cleaning up tests building ExtendedRobot that shouldn't be.

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  fix imports

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20846/files
  - new: https://git.openjdk.org/jdk/pull/20846/files/2750ad7b..bfa743b0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20846&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20846&range=07-08

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20846.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20846/head:pull/20846

PR: https://git.openjdk.org/jdk/pull/20846