pkg/plugins/dashboards_updater.go: Simplify err check

$ gometalinter --vendor --disable=all --enable=megacheck --deadline=10m ./...
pkg/plugins/dashboards_updater.go:51:2:warning: 'if err != nil { return err }; return nil' can be simplified to 'return err' (S1013) (megacheck)

pkg/plugins/dashboards_updater.go

@@ -48,11 +48,7 @@ func autoUpdateAppDashboard(pluginDashInfo *PluginDashboardInfoDTO, orgId int64)
 		Path:      pluginDashInfo.Path,
 	}
 
-	if err := bus.Dispatch(&updateCmd); err != nil {
-		return err
-	}
-
-	return nil
+	return bus.Dispatch(&updateCmd)
 }
 
 func syncPluginDashboards(pluginDef *PluginBase, orgId int64) {