Simplify phantom T props to plain null values instead of getters

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

packages/backend-plugin-api/src/services/system/types.ts

@@ -143,9 +143,7 @@ export function createServiceRef<
     id,
     scope,
     multiton,
-    get T(): TService {
-      return null as TService;
-    },
+    T: null as TService,
     toString() {
       return `serviceRef{${options.id}}`;
     },

packages/backend-plugin-api/src/wiring/createExtensionPoint.ts

@@ -43,9 +43,7 @@ export function createExtensionPoint<T>(
 ): ExtensionPoint<T> {
   return {
     id: options.id,
-    get T(): T {
-      return null as T;
-    },
+    T: null as T,
     toString() {
       return `extensionPoint{${options.id}}`;
     },