Chore: Remove bus (#47511) (#47677)

* Chore: Remove bus

* remove unused const

(cherry picked from commit 18e93c7077)

pkg/api/plugins_test.go

@@ -15,7 +15,6 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
-	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/plugins"
@@ -218,8 +217,6 @@ func callGetPluginAsset(sc *scenarioContext) {
 func pluginAssetScenario(t *testing.T, desc string, url string, urlPattern string, pluginStore plugins.Store,
 	logger log.Logger, fn scenarioFunc) {
 	t.Run(fmt.Sprintf("%s %s", desc, url), func(t *testing.T) {
-		defer bus.ClearBusHandlers()
-
 		hs := HTTPServer{
 			Cfg:         setting.NewCfg(),
 			pluginStore: pluginStore,