cli/command/trust: remove TestGetOrGenerateNotaryKeyAndInitRepo

This test was only testing trust.GetSignableRoles to return an error
if it's offline, which was duplicating the [TestGetSignableRolesError]
test.

[TestGetSignableRolesError]: https://github.com/docker/cli/blob/fe0a8d27912dc6fddc60cedcd35bbef27b776355/cli/trust/trust_test.go#L49-L55

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/trust/helpers_test.go

@@ -1,18 +0,0 @@
-package trust
-
-import (
-	"testing"
-
-	"github.com/theupdateframework/notary/client"
-	"github.com/theupdateframework/notary/passphrase"
-	"github.com/theupdateframework/notary/trustpinning"
-	"gotest.tools/v3/assert"
-)
-
-func TestGetOrGenerateNotaryKeyAndInitRepo(t *testing.T) {
-	notaryRepo, err := client.NewFileCachedRepository(t.TempDir(), "gun", "https://localhost", nil, passphrase.ConstantRetriever(passwd), trustpinning.TrustPinConfig{})
-	assert.NilError(t, err)
-
-	err = getOrGenerateRootKeyAndInitRepo(notaryRepo)
-	assert.Error(t, err, "client is offline")
-}