Remove unused files

no issue

- `app/helpers/gh-format-html` is duplicated in `lib/koenig-editor/addon/helpers/sanitize-html` and is not used anywhere else
- `app/helpers/gh-path` is not used anywhere - the API should be returning absolute URLs everywhere so path generation is no longer as necessary within templates
- `app/helpers/is-equal` replaced with `{{eq}}` from `ember-truth-helpers`
- `app/helpers/is-not` replaced with `{{not}}` from `ember-truth-helpers`
- `app/utils/isFinite` is not used anywhere
- `app/utils/titleize` is not used anywhere

ghost/admin/app/helpers/gh-format-html.js

@@ -1,25 +0,0 @@
-/* global html_sanitize*/
-import cajaSanitizers from 'ghost-admin/utils/caja-sanitizers';
-import {helper} from '@ember/component/helper';
-import {htmlSafe} from '@ember/string';
-
-export default helper(function (params) {
-    if (!params || !params.length) {
-        return;
-    }
-
-    let escapedhtml = params[0] || '';
-
-    // replace script and iFrame
-    escapedhtml = escapedhtml.replace(/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
-        '<pre class="js-embed-placeholder">Embedded JavaScript</pre>');
-    escapedhtml = escapedhtml.replace(/<iframe\b[^<]*(?:(?!<\/iframe>)<[^<]*)*<\/iframe>/gi,
-        '<pre class="iframe-embed-placeholder">Embedded iFrame</pre>');
-
-    // sanitize HTML
-    /* eslint-disable camelcase */
-    escapedhtml = html_sanitize(escapedhtml, cajaSanitizers.url, cajaSanitizers.id);
-    /* eslint-enable camelcase */
-
-    return htmlSafe(escapedhtml);
-});

ghost/admin/app/helpers/gh-path.js

@@ -1,60 +0,0 @@
-import ghostPaths from 'ghost-admin/utils/ghost-paths';
-import {helper} from '@ember/component/helper';
-import {htmlSafe} from '@ember/string';
-
-// Handlebars Helper {{gh-path}}
-// Usage: Assume 'http://www.myghostblog.org/myblog/'
-// {{gh-path}} or {{gh-path 'blog'}} for Ghost's root (/myblog/)
-// {{gh-path 'admin'}} for Ghost's admin root (/myblog/ghost/)
-// {{gh-path 'api'}} for Ghost's api root (/myblog/ghost/api/v0.1/)
-//
-// DO NOT USE - admin asset paths are now relative because we are using hash urls
-//              and the gh-path helper can get in the way of asset rewriting
-// {{gh-path 'asset' '/img/hi.png'}} for resolved url (/myblog/ghost/assets/img/hi.png)
-
-export default helper(function (params) {
-    let paths = ghostPaths();
-    let [path, url] = params;
-    let base;
-
-    if (!path) {
-        path = 'blog';
-    }
-
-    if (!/^(blog|admin|asset|api)$/.test(path)) {
-        url = path;
-        path = 'blog';
-    }
-
-    switch (path.toString()) {
-    case 'blog':
-        base = paths.blogRoot;
-        break;
-    case 'admin':
-        base = paths.adminRoot;
-        break;
-    case 'asset':
-        base = paths.assetRoot;
-        break;
-    case 'api':
-        base = paths.apiRoot;
-        break;
-    default:
-        base = paths.blogRoot;
-        break;
-    }
-
-    // handle leading and trailing slashes
-
-    base = base[base.length - 1] !== '/' ? `${base}/` : base;
-
-    if (url && url.length > 0) {
-        if (url[0] === '/') {
-            url = url.substr(1);
-        }
-
-        base = base + url;
-    }
-
-    return htmlSafe(base);
-});

ghost/admin/app/helpers/is-equal.js

@@ -1,11 +0,0 @@
-import {helper} from '@ember/component/helper';
-
-export function isEqual(params) {
-    let [lhs, rhs] = params;
-
-    return lhs === rhs;
-}
-
-export default helper(function (params) {
-    return isEqual(params);
-});

ghost/admin/app/helpers/is-not.js

@@ -1,9 +0,0 @@
-import {helper} from '@ember/component/helper';
-
-export function isNot(params) {
-    return !params;
-}
-
-export default helper(function (params) {
-    return isNot(params);
-});

ghost/admin/app/utils/isFinite.js

@@ -1,7 +0,0 @@
-/* globals window */
-
-// isFinite function from lodash
-
-export default function (value) {
-    return window.isFinite(value) && !window.isNaN(parseFloat(value));
-}

ghost/admin/app/utils/titleize.js

@@ -1,18 +0,0 @@
-import {capitalize} from '@ember/string';
-const lowerWords = [
-    'of', 'a', 'the', 'and', 'an', 'or', 'nor', 'but', 'is', 'if',
-    'then', 'else', 'when', 'at', 'from', 'by', 'on', 'off', 'for',
-    'in', 'out', 'over', 'to', 'into', 'with'
-];
-
-export default function (input) {
-    let words = input.split(' ').map((word, index) => {
-        if (index === 0 || lowerWords.indexOf(word) === -1) {
-            word = capitalize(word);
-        }
-
-        return word;
-    });
-
-    return words.join(' ');
-}

ghost/admin/tests/unit/helpers/is-equal-test.js

@@ -1,17 +0,0 @@
-import {
-    describe,
-    it
-} from 'mocha';
-import {expect} from 'chai';
-import {
-    isEqual
-} from 'ghost-admin/helpers/is-equal';
-
-describe('Unit: Helper: is-equal', function () {
-    // Replace this with your real tests.
-    it('works', function () {
-        let result = isEqual([42, 42]);
-
-        expect(result).to.be.ok;
-    });
-});

ghost/admin/tests/unit/helpers/is-not-test.js

@@ -1,17 +0,0 @@
-import {
-    describe,
-    it
-} from 'mocha';
-import {expect} from 'chai';
-import {
-    isNot
-} from 'ghost-admin/helpers/is-not';
-
-describe('Unit: Helper: is-not', function () {
-    // Replace this with your real tests.
-    it('works', function () {
-        let result = isNot(false);
-
-        expect(result).to.be.ok;
-    });
-});