Issue #2146517 by TR: Remove annotation 'use' statements from all core classes.

core/lib/Drupal/Core/Annotation/Translation.php

core/lib/Drupal/Core/Entity/Plugin/DataType/Entity.php

...ib/Drupal/Core/Entity/Plugin/DataType/EntityReference.php

.../Entity/Plugin/Validation/Constraint/BundleConstraint.php

.../Plugin/Validation/Constraint/EntityChangedConstraint.php

...ity/Plugin/Validation/Constraint/EntityTypeConstraint.php

...Plugin/Validation/Constraint/ValidReferenceConstraint.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Any.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Binary.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Boolean.php

...Drupal/Core/TypedData/Plugin/DataType/DateTimeIso8601.php

...Drupal/Core/TypedData/Plugin/DataType/DurationIso8601.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Email.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Float.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Integer.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Language.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/String.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/TimeSpan.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Timestamp.php