fix(test): temporary remove env var

[squakez]

I cannot come up with a better solution. If the execution is sequential, temporary removing the environment variable should be fine.

Close #3952

Release Note

fix(test): temporary remove env var

[squakez]

It's failing with:

GITHUB_TOKEN env var detected, using it for GitHub APIs authentication
  Error: cannot read sources: failed to resolve sources: GET https://api.github.com/gists/e2c3f9a5fd0d9e79b21b04809786f17a: 401 Bad credentials []

I'll check how to remove the env variable at all.

[squakez]

This is getting weird... now it fails with rate limit when the var is unset:

  Error: cannot read sources: failed to resolve sources: GET https://api.github.com/gists/e2c3f9a5fd0d9e79b21b04809786f17a: 403 API rate limit exceeded for 40.84.169.240. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.) [rate reset in 19m17s]
      testing.go:1169: test executed panic(nil) or runtime.Goexit: subtest may have called FailNow on a parent test

[squakez]

The error was cleared. The actual check failure will clear as well when merging.