Removed invitedBy from signup routes (#1087)

refs https://github.com/TryGhost/Ghost/issues/10286

- not used
- looking for more information? visit https://github.com/TryGhost/Ghost/pull/10291

ghost/admin/app/routes/signup.js

@@ -64,8 +64,6 @@ export default Route.extend(styleBody, UnauthenticatedRouteMixin, {
                     return resolve(this.transitionTo('signin'));
                 }
 
-                signupDetails.set('invitedBy', response.invitation[0].invitedBy);
-
                 // set blogTitle, so password validation has access to it
                 signupDetails.set('blogTitle', this.get('config.blogTitle'));
 

ghost/admin/mirage/config/authentication.js

@@ -34,14 +34,11 @@ export default function mockAuthentication(server) {
     server.get('/authentication/invitation/', function (schema, request) {
         let {email} = request.queryParams;
         let invite = schema.invites.findBy({email});
-        let user = schema.users.find(invite.createdBy);
         let valid = !!invite;
-        let invitedBy = user && user.name;
 
         return {
             invitation: [{
-                valid,
-                invitedBy
+                valid
             }]
         };
     });