✨ Upgraded our Zapier integration to use API Keys and allow post creation

no issue
- move the Zapier API Key details out of developer experiments because our Zapier 2.0.0 version is now public and requires an API Key when connecting

ghost/admin/app/controllers/settings/integrations/zapier.js

@@ -8,7 +8,6 @@ import {inject as service} from '@ember/service';
 import {task, timeout} from 'ember-concurrency';
 
 export default Controller.extend({
-    config: service(),
     ghostPaths: service(),
 
     isTesting: undefined,

ghost/admin/app/templates/settings/integrations/zapier.hbs

@@ -19,7 +19,6 @@
             </div>
         </section>
 
-        {{#if config.enableDeveloperExperiments}}
         <div class="m15 ba br3 b--lightgrey mt4">
             <table class="ma0" style="table-layout: fixed">
                 <tbody>
@@ -68,7 +67,6 @@
                 </tbody>
             </table>
         </div>
-        {{/if}}
 
         <div class="mt12" id="zapier-toggle">
             <div class="gh-setting-content gh-setting-content--no-action">