Revert "Checkout repo to a folder with spaces."

This reverts commit 52647f42196ba143984bda93ef9d6c0b6cdb2376.

Reason for revert: Caused a build failure https://ci.chromium.org/p/flutter/builders/try/Linux%20SDK%20Drone/104770?

Original change's description:
> Checkout repo to a folder with spaces.
>
> Change-Id: I80f74d5afb74f5a8505bd680272a341fa52f1702
> Bug: https://github.com/flutter/flutter/issues/62919
> Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/8300
> Commit-Queue: Christopher Fujino <fujino@google.com>
> Reviewed-by: Christopher Fujino <fujino@google.com>

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

Change-Id: Icc0c974ad35100da44377e745195b72146dcc6f5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: https://github.com/flutter/flutter/issues/62919
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/8340
Reviewed-by: Christopher Fujino <fujino@google.com>
Commit-Queue: Christopher Fujino <fujino@google.com>