Issue #2092095 by tstoeckler, ParisLiakos: Remove \Drupal\Component\Utility\MapArray.

core/includes/common.inc

core/includes/form.inc

core/includes/theme.inc

core/includes/update.inc

core/lib/Drupal/Component/Plugin/DefaultPluginBag.php

core/lib/Drupal/Component/Utility/MapArray.php

...Drupal/Core/Entity/FieldableDatabaseStorageController.php

core/lib/Drupal/Core/Utility/ProjectInfo.php

...s/aggregator/lib/Drupal/aggregator/FeedFormController.php

...les/aggregator/lib/Drupal/aggregator/Form/OpmlFeedAdd.php

...ib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php

...gregator/Plugin/aggregator/processor/DefaultProcessor.php

...ock/tests/Drupal/block/Tests/CategoryAutocompleteTest.php

core/modules/comment/comment.module

.../config/lib/Drupal/config/Form/ConfigSingleExportForm.php

core/modules/datetime/lib/Drupal/datetime/DateHelper.php

core/modules/dblog/dblog.module

core/modules/edit/lib/Drupal/edit/EditController.php

...rence/Plugin/entity_reference/selection/SelectionBase.php

...pal/entity_reference/Plugin/views/row/EntityReference.php