Removing rouge links.related

data.app-page-people.js

export default {
  data: [
    {
      id: '1',
      type: 'app-page-people',
      attributes: {
        'sort-order': 34
      },
      relationships: {
        page: {
          links: {
            self: 'https://example.com/api/self/1',
            related: 'https://example.com/api/related/1'
          },
          data: {
            id: '1',
            type: 'pages'
          }
        }
      }
    }
  ]
};

data.pages.js

export default {
  data: [
    {
      id: '1',
      type: 'pages',
      attributes: {
        name: 'Page 1'
      }
    },
    {
      id: '2',
      type: 'pages',
      attributes: {
        name: 'Page 2'
      }
    }
  ]
};

models.app-page-person.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
  sortOrder: attr('number'),
  page: belongsTo('page', { async: false })
});

models.page.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
  name: attr('string')
});

routes.application.js

import Ember from 'ember';
import PagesData from '../data/pages';
import AppPagePeopleData from '../data/app-page-people';

export default Ember.Route.extend({
  beforeModel() {
    this.store.pushPayload(PagesData);
  },
  
  model() {
    this.store.pushPayload(AppPagePeopleData);
    let ids = AppPagePeopleData.data.mapBy('id');
    return this.store.peekAll('app-page-person')
    	.filter(model => ids.includes(model.id));
  }
});

serializers.app-page-person.js

import ApplicationSerializer from './application';

export default ApplicationSerializer.extend({
  extractRelationship(relationshipHash) {
    if (relationshipHash.links) {
      // Comment next line to see the error
      delete relationshipHash.links.related;
    }
    return this._super(...arguments);
  }
});

serializers.application.js

import JSONAPISerializer from 'ember-data/serializers/json-api';

export default JSONAPISerializer;

templates.application.hbs

<ul>
  {{#each model as |item|}}
    <li>{{item.page.name}}</li>
  {{/each}}
</ul>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}