lint: fix some unused parameter issues

[rleungx]

Remove some unused parameters.

RELEASE NOTES: None

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Ryan Leung (971f76a)

[zasweq]

This doesn't feel right. Assigning to file owner Ashitha to take a look. This looks like it creates functional change as well. Also, our vet didn't seem to complain around these files.

[ashithasantosh]

This doesn't feel right. Assigning to file owner Ashitha to take a look. This looks like it creates functional change as well. Also, our vet didn't seem to complain around these files.

I only own rbac_translator.go, and the changes there LGTM. Thanks for doing this.
You may want to add other file owners to reviewer list.

[dfawley]

@zasweq you said you may have noticed a behavior change somewhere? If so, please comment the line. I quickly reviewed and everything seemed correct, but I didn't look super closely, either.

[zasweq]

LGTM, outside of the vet failure. Thanks for this. I had an unused testing.T parameter in my cluster handler test that I based off other tests in the codebase (both of which got removed), which I thought was required for testing haha.

[dfawley]

vet-proto is not required to pass to submit; this appears to be unrelated. I'll merge this now.