[builder] Delete old name of the result upload script.

The use of the old name was removed in https://dart.googlesource.com/recipes/+/fe16e9eea4dc0e880fa829a4b7c6c3b0c4eece3a

Change-Id: I6180393746ff6da5e2c30961322f6b21bb630756
Reviewed-on: https://dart-review.googlesource.com/c/dart_ci/+/329440
Reviewed-by: William Hesse <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>

Author: rmacnak-google