refractor: delete redundant files (#295)

* Remove obsolete index.ts files.
* Remove About Module.

Fixes #294

src/app/settings/settings-routing.module.ts

@@ -3,10 +3,10 @@ import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
 /** Routing Imports */
-import { Route } from '../core';
+import { Route } from '../core/route/route.service';
 
 /** Translation Imports */
-import { extract } from '../core';
+import { extract } from '../core/i18n/i18n.service';
 
 /** Custom Components */
 import { SettingsComponent } from './settings.component';