fix(deps): Remove last rimraf mention

[GabDug]

Hey 👋

I was also a little bit confused to see rimraf sneak up in my dependency tree.

Here's a MR to remove the unused rimraf dependency for gax, and unused @types/rimraf for pack-n-play.

Similar to #852, additional fix for #851

Cheers!

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[mnahkies]

Would love to see this merged / released - rimraf is pulling in deprecated versions of glob and then minimatch triggering alerts for GHSA-3ppc-4f35-3m26 on all our projects.

eg:

@google-cloud/iam-credentials>google-gax>rimraf>glob>minimatch

[sofisl]

/gcbrun

[sofisl]

@GabDug unfortunately I cannot update your PR, I think it's from a fork. I am in the middle of migrating this repo to google-cloud-node. can you reopen this PR in google-cloud-node, once its migrated? I've fixed the tests which is why we need to upgrade.