Remove experimental CLI

[axw]

See #293 (comment) and proceeding comments.

Closes #293

[ghost]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2022-09-09T03:32:44.467+0000

• Duration: 8 min 53 sec

Test stats 🧪

Test	Results
Failed	0
Passed	160
Skipped	2
Total	162

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[simitt]

LGTM!
@astorm any concerns from your side when removing the CLI? (see reasoning in #293)

[astorm]

any concerns from your side when removing the CLI?

Nope, no concerns. 👍