MainApp: restore appcomponent method

Not needed for the final approach

Signed-off-by: Álvaro Brey <alvaro.brey@nextcloud.com>

app/src/main/java/com/owncloud/android/MainApp.java

@@ -255,14 +255,11 @@ public class MainApp extends MultiDexApplication implements HasAndroidInjector {
     }
 
     private void initDagger() {
-        appComponent = buildAppComponent();
-        appComponent.inject(this);
-    }
-
-    protected AppComponent buildAppComponent() {
-        return DaggerAppComponent.builder()
+        appComponent = DaggerAppComponent.builder()
             .application(this)
             .build();
+
+        appComponent.inject(this);
     }
 
     /**