Issue #2655580 by claudiu.cristea: Dead code: hook_system_theme_info() removed...

Issue #2655580 by claudiu.cristea: Dead code: hook_system_theme_info() removed but is still implemented

core/modules/color/tests/modules/color_test/color_test.module

-<?php
-
-/**
- * @file
- * Provide test color module.
- */
-
-/**
- * Implements hook_system_theme_info().
- */
-function color_test_system_theme_info() {
-  $themes['color_test_theme'] = drupal_get_path('module', 'color_test') . '/themes/color_test_theme/color_test_theme.info.yml';
-  return $themes;
-}