Removed usage of /configuration/timezones/ endpoint

no issue
- replaced timezones endpoint with `@tryghost/timezone-data` module

ghost/admin/app/services/config.js

@@ -1,6 +1,7 @@
 import Ember from 'ember';
 import RSVP from 'rsvp';
 import Service, {inject as service} from '@ember/service';
+import timezoneData from '@tryghost/timezone-data';
 import {computed} from '@ember/object';
 
 // ember-cli-shims doesn't export _ProxyMixin
@@ -55,15 +56,7 @@ export default Service.extend(_ProxyMixin, {
     },
 
     availableTimezones: computed(function () {
-        let timezonesUrl = this.ghostPaths.url.api('configuration', 'timezones');
-
-        return this.ajax.request(timezonesUrl).then((configTimezones) => {
-            let [timezonesObj] = configTimezones.configuration;
-
-            timezonesObj = timezonesObj.timezones;
-
-            return timezonesObj;
-        });
+        return RSVP.resolve(timezoneData);
     }),
 
     blogDomain: computed('blogUrl', function () {

ghost/admin/mirage/config/config.js

@@ -21,16 +21,4 @@ export default function mockConfig(server) {
             config: db.configs.find(1)
         };
     });
-
-    server.get('/configuration/timezones/', function ({db}) {
-        if (isEmpty(db.timezones)) {
-            server.loadFixtures('timezones');
-        }
-
-        return {
-            configuration: [{
-                timezones: db.timezones
-            }]
-        };
-    });
 }

ghost/admin/package.json

@@ -30,6 +30,7 @@
     "@ember/optional-features": "0.7.0",
     "@html-next/vertical-collection": "1.0.0-beta.12",
     "@tryghost/mobiledoc-kit": "0.11.1-ghost.6",
+    "@tryghost/timezone-data": "0.1.1",
     "autoprefixer": "9.4.8",
     "blueimp-md5": "2.10.0",
     "broccoli-asset-rev": "3.0.0",

ghost/admin/tests/acceptance/error-handling-test.js

@@ -67,7 +67,7 @@ describe('Acceptance: Error Handling', function () {
             });
 
             it('displays alert and aborts the transition when an ember-ajax error is thrown whilst navigating', async function () {
-                this.server.get('/configuration/timezones/', versionMismatchResponse);
+                this.server.get('/settings/', versionMismatchResponse);
 
                 await visit('/settings/tags');
                 await click('[data-test-nav="settings"]');

ghost/admin/tests/integration/services/config-test.js

@@ -4,29 +4,6 @@ import {describe, it} from 'mocha';
 import {expect} from 'chai';
 import {setupTest} from 'ember-mocha';
 
-function stubAvailableTimezonesEndpoint(server) {
-    server.get('/ghost/api/v2/admin/configuration/timezones', function () {
-        return [
-            200,
-            {'Content-Type': 'application/json'},
-            JSON.stringify({
-                configuration: [{
-                    timezones: [{
-                        label: '(GMT -11:00) Midway Island, Samoa',
-                        name: 'Pacific/Pago_Pago',
-                        offset: -660
-                    },
-                    {
-                        label: '(GMT) Greenwich Mean Time : Dublin, Edinburgh, London',
-                        name: 'Europe/Dublin',
-                        offset: 0
-                    }]
-                }]
-            })
-        ];
-    });
-}
-
 describe('Integration: Service: config', function () {
     setupTest('service:config', {
         integration: true
@@ -44,14 +21,13 @@ describe('Integration: Service: config', function () {
 
     it('returns a list of timezones in the expected format', function (done) {
         let service = this.subject();
-        stubAvailableTimezonesEndpoint(server);
 
         service.get('availableTimezones').then(function (timezones) {
-            expect(timezones.length).to.equal(2);
+            expect(timezones.length).to.equal(66);
             expect(timezones[0].name).to.equal('Pacific/Pago_Pago');
             expect(timezones[0].label).to.equal('(GMT -11:00) Midway Island, Samoa');
-            expect(timezones[1].name).to.equal('Europe/Dublin');
-            expect(timezones[1].label).to.equal('(GMT) Greenwich Mean Time : Dublin, Edinburgh, London');
+            expect(timezones[1].name).to.equal('Pacific/Honolulu');
+            expect(timezones[1].label).to.equal('(GMT -10:00) Hawaii');
             done();
         });
     });

ghost/admin/yarn.lock

@@ -713,6 +713,11 @@
     mobiledoc-dom-renderer "0.6.5"
     mobiledoc-text-renderer "0.3.2"
 
+"@tryghost/timezone-data@0.1.1":
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/@tryghost/timezone-data/-/timezone-data-0.1.1.tgz#4ae120de518f6d5b81d16177bbc7fcd159d5c925"
+  integrity sha512-6cJHmh7PkhRYgzi46xS37HGR4uZ/pCmfzsATZFZP3BtP16PpgOfH0J3D0Q8wP1GM0C7OTRKhtyqfUaLS/RkSJA==
+
 "@types/acorn@^4.0.3":
   version "4.0.4"
   resolved "https://registry.yarnpkg.com/@types/acorn/-/acorn-4.0.4.tgz#b3ee72dcd81d1daeea03fed67d7ca7c2574c313b"