Revert "Adding format and lint scripts to LUCI tests as part of the cirrus to luci engine migration."

This reverts commit 2b0edce90ba0f984639a340b03827d09a52e3884.

Reason for revert: Broke Mac builders,which need Xcode to install this script.

Original change's description:
> Adding format and lint scripts to LUCI tests as part of the cirrus to luci engine migration.
> Build step didn't work, script needs to be modified.
> Added for web and host recipes.
> 
> In the cirrus file: https://github.com/flutter/engine/blob/master/.cirrus.yml#L114
> 
> web_recipe run: https://chromium-swarm.appspot.com/task?id=4d71a228c2157910
> engine run: https://chromium-swarm.appspot.com/task?id=4d71a1fd37d8c410
> 
> Change-Id: Ie45ca4007c766716a0475f406ffa4fdb78e3875d
> Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/4320
> Reviewed-by: Godofredo Contreras <godofredoc@google.com>
> Commit-Queue: Nurhan Turgut <nurhan@google.com>

TBR=wutong@google.com,godofredoc@google.com,flutter-scoped@luci-project-accounts.iam.gserviceaccount.com,nurhan@google.com

Change-Id: I9f3e5a2608755b598557efe088e937e6a7431c78
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/4342
Reviewed-by: Dan Field <dnfield@google.com>
Commit-Queue: Dan Field <dnfield@google.com>