Fixing up commit according to review

test/helpers/api-integration/v3/object-generators.js

@@ -128,9 +128,7 @@ export async function createAndPopulateGroup (settings = {}) {
 
   await Bluebird.all(invitationPromises);
 
-  await Bluebird.all(invitees.map((invitee) => {
-    return invitee.sync();
-  }));
+  await Bluebird.map(invitees, (invitee) => invitee.sync());
 
   return {
     groupLeader,

website/server/controllers/api-v3/groups.js

@@ -514,7 +514,6 @@ async function _inviteByUUID (uuid, group, inviter, req, res) {
     }
 
     userToInvite.invitations.party = {id: group._id, name: group.name, inviter: inviter._id};
-    return userToInvite.save();
   }
 
   let groupLabel = group.type === 'guild' ? 'Guild' : 'Party';