remove unnecessary assignment of grantedGroups

apps/app/src/server/models/page.ts

@@ -787,14 +787,6 @@ export async function pushRevision(pageData, newRevision, user) {
   pageData.lastUpdateUser = user?._id ?? user;
   pageData.updatedAt = Date.now();
 
-  // Set the _id of grantedGroups to revision._id
-  if (pageData.grantedGroups.length > 0) {
-    pageData.grantedGroups = pageData.grantedGroups.map(group => ({
-      ...group,
-      _id: newRevision._id,
-    }));
-  }
-
   return pageData.save();
 }