Issue #3261241 by andypost, longwave: Remove deprecated field module functions

core/lib/Drupal/Core/Field/WidgetBase.php

core/modules/field/field.api.php

core/modules/field_ui/field_ui.services.yml

core/modules/field_ui/src/Routing/FieldUiRouteEnhancer.php

...es/field_ui/tests/src/Kernel/FieldUiRouteEnhancerTest.php

...ules/field_ui/tests/src/Unit/FieldUiRouteEnhancerTest.php

core/phpstan-baseline.neon