Merge pull request #21294 from NullVoxPopuli-ai-agent/nvp/remove-default-helper-manager-flag

Remove unused DEFAULT_HELPER_MANAGER feature flag

Author: NullVoxPopuli

packages/@ember/-internals/glimmer/lib/environment.ts

@@ -19,10 +19,6 @@ import toBool from './utils/to-bool';
 // Setup global context
 
 setGlobalContext({
-  FEATURES: {
-    DEFAULT_HELPER_MANAGER: true,
-  },
-
   scheduleRevalidate() {
     _backburner.ensureInstance();
   },

packages/@glimmer/global-context/index.ts

@@ -165,9 +165,6 @@ export interface GlobalContext {
       id: string;
     }
   ) => void;
-  FEATURES?: {
-    DEFAULT_HELPER_MANAGER?: boolean;
-  };
 }
 
 let globalContextWasSet = false;