remove dangerous links from readme

[thesuperzapper]

We no longer control the kubeflow-testing.com domain, and it seems to be being squatted by some kind of data harvesting group.

[thesuperzapper]

@james-jwu @zijianjoy can you please give me a quick /approve and /lgtm on this one, as we don't want to link people to a virus!

/assign @james-jwu @zijianjoy

[Talador12]

/lgtm

[google-oss-prow]

@Talador12: changing LGTM is restricted to collaborators

In response to this:

/lgtm

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[james-jwu]

/lgtm
/approve

What sites are the links supposed to point to?

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: james-jwu

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [james-jwu]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[thesuperzapper]

@james-jwu these are legacy links from when Google ran the infrastructure, I don't think we have anything equivalent at the current time.