Issue #1444620 by dawehner, sun, heyrocker: Remove file signing from configuration system.

core/includes/bootstrap.inc

core/includes/config.inc

core/includes/install.core.inc

core/includes/install.inc

...rupal/Core/Config/ConfigFileStorageSignatureException.php

core/lib/Drupal/Core/Config/DrupalConfigVerifiedStorage.php

...upal/Core/Config/DrupalConfigVerifiedStorageInterface.php

core/lib/Drupal/Core/Config/FileStorage.php

core/modules/config/config.test

core/modules/simpletest/drupal_web_test_case.php

sites/default/default.settings.php