RFR: 8339524: Clean up a few ExtendedRobot tests [v3]

[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/ca7b7532..04eec257

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20846&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20846&range=01-02

  Stats: 32 lines in 2 files changed: 0 ins; 20 del; 12 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