test: Remove unnecessary shadow root helpers

[Artur-]

No description provided.

[github-actions]

Unit Test Results

   717 files     717 suites   21m 12s ⏱️
5 618 tests 5 568 ✔️ 50 💤 0 ❌
5 631 runs  5 581 ✔️ 50 💤 0 ❌

Results for commit e760742.

♻️ This comment has been updated with latest results.

[vaadin-bot]

Hi @Artur- and @caalador, when i performed cherry-pick to this commit to 8.0, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick 30afed7
error: could not apply 30afed7... test: Remove unnecessary shadow root helpers (#12573)
hint: after resolving the conflicts, mark the corrected paths
hint: with 'git add ' or 'git rm '
hint: and commit the result with 'git commit'

[vaadin-bot]

TC Format Checker Report - 10:01 - 16 - Dec

There are 3 files with format errors

• To see a complete report of formatting issues, download the differences file

• To fix the build, please run mvn formatter:format in your branch and commit the changes.

• Optionally you might add the following line in your .git/hooks/pre-commit file:

  mvn formatter:format
  

Here is the list of files with format issues in your PR:

flow-tests/test-live-reload/src/test/java/com/vaadin/flow/uitest/ui/FrontendLiveReloadIT.java
flow-tests/test-live-reload/src/test/java/com/vaadin/flow/uitest/ui/JavaLiveReloadIT.java
flow-tests/test-live-reload/src/test/java/com/vaadin/flow/uitest/ui/PreserveOnRefreshLiveReloadIT.java