FeatureToggles: remove open type declaration (#64645)

pkg/services/featuremgmt/codeowners.go

@@ -22,4 +22,5 @@ const (
 	hostedGrafanaTeam                           codeowner = "@grafana/hosted-grafana-team"
 	awsPluginsSquad                             codeowner = "@grafana/aws-plugins"
 	appO11ySquad                                codeowner = "@grafana/app-o11y"
+	grafanaPartnerPluginsSquad                  codeowner = "@grafana/partner-plugins"
 )

pkg/services/featuremgmt/toggles_gen_test.go

@@ -128,13 +128,15 @@ func generateTypeScript() string {
  * conf/custom.ini to enable features under development or not yet available in
  * stable version.
  *
- * Only enabled values will be returned in this interface
+ * Only enabled values will be returned in this interface.
+ *
+ * NOTE: the possible values may change between versions without notice, although
+ * this may cause compilation issues when depending on removed feature keys, the
+ * runtime state will continue to work.
  *
  * @public
  */
 export interface FeatureToggles {
-  [name: string]: boolean | undefined; // support any string value
-
 `
 	for _, flag := range standardFeatureFlags {
 		buf += "  " + getTypeScriptKey(flag.Name) + "?: boolean;\n"