RFR: 8339524: Clean up a few ExtendedRobot tests [v2]

[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:

  update tests

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/20846/files
  - new: https://git.openjdk.org/jdk/pull/20846/files/55919391..ca7b7532

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20846&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20846&range=00-01

  Stats: 66 lines in 2 files changed: 12 ins; 20 del; 34 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