refactor(api): update group deletion calls to use write API

public/src/admin/manage/groups.js

@@ -2,8 +2,9 @@
 
 define('admin/manage/groups', [
 	'categorySelector',
+	'slugify',
 	'api',
-], function (categorySelector, api) {
+], function (categorySelector, slugify, api) {
 	var	Groups = {};
 
 	var intervalId = 0;
@@ -61,15 +62,7 @@ define('admin/manage/groups', [
 				case 'delete':
 					bootbox.confirm('[[admin/manage/groups:alerts.confirm-delete]]', function (confirm) {
 						if (confirm) {
-							socket.emit('groups.delete', {
-								groupName: groupName,
-							}, function (err) {
-								if (err) {
-									return app.alertError(err.message);
-								}
-
-								ajaxify.refresh();
-							});
+							api.del(`/groups/${slugify(groupName)}`, {}).then(ajaxify.refresh).catch(app.alertError);
 						}
 					});
 					break;

public/src/client/groups/details.js

@@ -229,16 +229,10 @@ define('forum/groups/details', [
 			if (confirm) {
 				bootbox.prompt('Please enter the name of this group in order to delete it:', function (response) {
 					if (response === groupName) {
-						socket.emit('groups.delete', {
-							groupName: groupName,
-						}, function (err) {
-							if (!err) {
-								app.alertSuccess('[[groups:event.deleted, ' + utils.escapeHTML(groupName) + ']]');
-								ajaxify.go('groups');
-							} else {
-								app.alertError(err.message);
-							}
-						});
+						api.del(`/groups/${slugify(groupName)}`, {}).then(() => {
+							app.alertSuccess('[[groups:event.deleted, ' + utils.escapeHTML(groupName) + ']]');
+							ajaxify.go('groups');
+						}).catch(app.alertError);
 					}
 				});
 			}