Don't set GITHUB_TOKEN (#2089)

This needs to be explicitly in the `env` to be consistent with GitHub

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/runner/run_context.go

@@ -911,7 +911,6 @@ func (rc *RunContext) withGithubEnv(ctx context.Context, github *model.GithubCon
 	env["GITHUB_REF"] = github.Ref
 	env["GITHUB_REF_NAME"] = github.RefName
 	env["GITHUB_REF_TYPE"] = github.RefType
-	env["GITHUB_TOKEN"] = github.Token
 	env["GITHUB_JOB"] = github.Job
 	env["GITHUB_REPOSITORY_OWNER"] = github.RepositoryOwner
 	env["GITHUB_RETENTION_DAYS"] = github.RetentionDays

pkg/runner/step_test.go

@@ -182,7 +182,6 @@ func TestSetupEnv(t *testing.T) {
 		"GITHUB_RUN_ID":            "runId",
 		"GITHUB_RUN_NUMBER":        "1",
 		"GITHUB_SERVER_URL":        "https://",
-		"GITHUB_TOKEN":             "",
 		"GITHUB_WORKFLOW":          "",
 		"INPUT_STEP_WITH":          "with-value",
 		"RC_KEY":                   "rcvalue",