Remove unused fake secrets service from query tests

pkg/services/query/query_test.go

@@ -18,7 +18,6 @@ import (
 	datasources "github.com/grafana/grafana/pkg/services/datasources/service"
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/query"
-	"github.com/grafana/grafana/pkg/services/secrets"
 	"github.com/grafana/grafana/pkg/services/secrets/kvstore"
 
 	"github.com/stretchr/testify/require"
@@ -122,16 +121,6 @@ func (ts *fakeOAuthTokenService) IsOAuthPassThruEnabled(*models.DataSource) bool
 	return ts.passThruEnabled
 }
 
-type fakeSecretsService struct {
-	secrets.Service
-
-	decryptedJson map[string]string
-}
-
-func (s *fakeSecretsService) DecryptJsonData(ctx context.Context, sjd map[string][]byte) (map[string]string, error) {
-	return s.decryptedJson, nil
-}
-
 type fakeDataSourceCache struct {
 	ds *models.DataSource
 }