diff --git a/core/config/schema/core.data_types.schema.yml b/core/config/schema/core.data_types.schema.yml
index 0c9ad70..3ca97c1 100644
--- a/core/config/schema/core.data_types.schema.yml
+++ b/core/config/schema/core.data_types.schema.yml
@@ -177,11 +177,6 @@ theme_settings:
         use_default:
           type: boolean
           label: 'Use default'
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: theme_settings.third_party.[%key]
 
 theme_breakpoints_default:
   type: sequence
@@ -269,6 +264,11 @@ config_entity:
     dependencies:
       type: config_dependencies
       label: 'Dependencies'
+    third_party_settings:
+      type: sequence
+      label: 'Third party settings'
+      sequence:
+        - type: fixme.third_party.[%key]
 
 block_settings:
   type: mapping
@@ -393,11 +393,6 @@ field_config_base:
       label: 'Default value callback'
     settings:
       type: field.field_settings.[%parent.field_type]
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: field_config.third_party.[%key]
     field_type:
       type: string
       label: 'Field type'
diff --git a/core/config/schema/core.entity.schema.yml b/core/config/schema/core.entity.schema.yml
index 8de3f33..e7f9893 100644
--- a/core/config/schema/core.entity.schema.yml
+++ b/core/config/schema/core.entity.schema.yml
@@ -25,9 +25,6 @@ core.entity_view_mode.*.*:
     langcode:
       type: string
       label: 'Default language'
-    dependencies:
-      type: config_dependencies
-      label: 'Dependencies'
 
 core.entity_form_mode.*.*:
   type: config_entity
@@ -96,11 +93,6 @@ core.entity_view_display.*.*.*:
       sequence:
         - type: boolean
           label: 'Value'
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: entity_view_display.third_party.[%key]
 
 # Overview configuration information for form mode displays.
 core.entity_form_display.*.*.*:
@@ -149,11 +141,6 @@ core.entity_form_display.*.*.*:
       sequence:
         - type: boolean
           label: 'Component'
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: entity_form_display.third_party.[%key]
 
 # Default schema for entity display field with undefined type.
 field.formatter.settings.*:
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index ad5f0d1..f4cc3ec 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -7,12 +7,12 @@
 
 namespace Drupal\Core\Config\Entity;
 
-use Drupal\Component\Plugin\ConfigurablePluginInterface;
 use Drupal\Component\Utility\String;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Config\Schema\SchemaIncompleteException;
 use Drupal\Core\Entity\Entity;
 use Drupal\Core\Config\ConfigDuplicateUUIDException;
+use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityWithPluginCollectionInterface;
 use Drupal\Core\Language\LanguageInterface;
@@ -29,6 +29,8 @@
     addDependency as addDependencyTrait;
   }
 
+  use ThirdPartySettingsTrait;
+
   /**
    * The original ID of the configuration entity.
    *
diff --git a/core/lib/Drupal/Core/Entity/EntityDisplayBase.php b/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
index ea39c51..ac4c932 100644
--- a/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
@@ -8,7 +8,6 @@
 namespace Drupal\Core\Entity;
 
 use Drupal\Core\Config\Entity\ConfigEntityBase;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Display\EntityDisplayInterface;
 use Drupal\field\Entity\FieldConfig;
@@ -20,8 +19,6 @@
  */
 abstract class EntityDisplayBase extends ConfigEntityBase implements EntityDisplayInterface {
 
-  use ThirdPartySettingsTrait;
-
   /**
    * Unique ID for the config entity.
    *
diff --git a/core/lib/Drupal/Core/Field/FieldConfigBase.php b/core/lib/Drupal/Core/Field/FieldConfigBase.php
index 7f81e58..9e3cc17 100644
--- a/core/lib/Drupal/Core/Field/FieldConfigBase.php
+++ b/core/lib/Drupal/Core/Field/FieldConfigBase.php
@@ -9,7 +9,6 @@
 
 use Drupal\Component\Plugin\DependentPluginInterface;
 use Drupal\Core\Config\Entity\ConfigEntityBase;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\FieldableEntityInterface;
 use Drupal\Core\Field\TypedData\FieldItemDataDefinition;
@@ -20,8 +19,6 @@
  */
 abstract class FieldConfigBase extends ConfigEntityBase implements FieldConfigInterface {
 
-  use ThirdPartySettingsTrait;
-
   /**
    * The field ID.
    *
diff --git a/core/modules/contact/config/schema/contact.schema.yml b/core/modules/contact/config/schema/contact.schema.yml
index 011ae37..7ebb6f4 100644
--- a/core/modules/contact/config/schema/contact.schema.yml
+++ b/core/modules/contact/config/schema/contact.schema.yml
@@ -22,11 +22,6 @@ contact.form.*:
     weight:
       type: integer
       label: 'Weight'
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: contact_form.third_party.[%key]
 
 contact.settings:
   type: mapping
diff --git a/core/modules/contact/src/Entity/ContactForm.php b/core/modules/contact/src/Entity/ContactForm.php
index 2dd7ce3..2331a7c 100644
--- a/core/modules/contact/src/Entity/ContactForm.php
+++ b/core/modules/contact/src/Entity/ContactForm.php
@@ -9,7 +9,6 @@
 
 use Drupal\Core\Config\Entity\ConfigEntityBundleBase;
 use Drupal\contact\ContactFormInterface;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 
 /**
  * Defines the contact form entity.
@@ -41,8 +40,6 @@
  */
 class ContactForm extends ConfigEntityBundleBase implements ContactFormInterface {
 
-  use ThirdPartySettingsTrait;
-
   /**
    * The form ID.
    *
diff --git a/core/modules/image/config/schema/image.schema.yml b/core/modules/image/config/schema/image.schema.yml
index 87f38f6..00268ef 100644
--- a/core/modules/image/config/schema/image.schema.yml
+++ b/core/modules/image/config/schema/image.schema.yml
@@ -22,11 +22,6 @@ image.style.*:
               type: integer
             uuid:
               type: string
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: image_style.third_party.[%key]
 
 image.effect.*:
   type: mapping
diff --git a/core/modules/image/src/Entity/ImageStyle.php b/core/modules/image/src/Entity/ImageStyle.php
index a57904d..a592aac 100644
--- a/core/modules/image/src/Entity/ImageStyle.php
+++ b/core/modules/image/src/Entity/ImageStyle.php
@@ -9,7 +9,6 @@
 
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Config\Entity\ConfigEntityBase;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityWithPluginCollectionInterface;
 use Drupal\Core\Routing\RequestHelper;
@@ -52,8 +51,6 @@
  */
 class ImageStyle extends ConfigEntityBase implements ImageStyleInterface, EntityWithPluginCollectionInterface {
 
-  use ThirdPartySettingsTrait;
-
   /**
    * The name of the image style to use as replacement upon delete.
    *
diff --git a/core/modules/node/config/schema/node.schema.yml b/core/modules/node/config/schema/node.schema.yml
index 0680b57..abb9b50 100644
--- a/core/modules/node/config/schema/node.schema.yml
+++ b/core/modules/node/config/schema/node.schema.yml
@@ -36,11 +36,6 @@ node.type.*:
     display_submitted:
       type: boolean
       label: 'Display setting for author and date Submitted by post information'
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: node_type.third_party.[%key]
 
 # Plugin \Drupal\node\Plugin\Search\NodeSearch
 search.plugin.node_search:
diff --git a/core/modules/node/src/Entity/NodeType.php b/core/modules/node/src/Entity/NodeType.php
index e33c1ec..535cd17 100644
--- a/core/modules/node/src/Entity/NodeType.php
+++ b/core/modules/node/src/Entity/NodeType.php
@@ -8,7 +8,6 @@
 namespace Drupal\node\Entity;
 
 use Drupal\Core\Config\Entity\ConfigEntityBundleBase;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\node\NodeTypeInterface;
 
@@ -41,7 +40,6 @@
  * )
  */
 class NodeType extends ConfigEntityBundleBase implements NodeTypeInterface {
-  use ThirdPartySettingsTrait;
 
   /**
    * The machine name of this node type.
diff --git a/core/modules/taxonomy/config/schema/taxonomy.schema.yml b/core/modules/taxonomy/config/schema/taxonomy.schema.yml
index cf4a3a9..c79fa5f 100644
--- a/core/modules/taxonomy/config/schema/taxonomy.schema.yml
+++ b/core/modules/taxonomy/config/schema/taxonomy.schema.yml
@@ -33,11 +33,6 @@ taxonomy.vocabulary.*:
     weight:
       type: integer
       label: 'Weight'
-    third_party_settings:
-      type: sequence
-      label: 'Third party settings'
-      sequence:
-        - type: taxonomy.vocabulary.third_party.[%key]
 
 field.storage_settings.taxonomy_term_reference:
   type: base_entity_reference_field_settings
diff --git a/core/modules/taxonomy/src/Entity/Vocabulary.php b/core/modules/taxonomy/src/Entity/Vocabulary.php
index e650551..b6decd5 100644
--- a/core/modules/taxonomy/src/Entity/Vocabulary.php
+++ b/core/modules/taxonomy/src/Entity/Vocabulary.php
@@ -8,7 +8,6 @@
 namespace Drupal\taxonomy\Entity;
 
 use Drupal\Core\Config\Entity\ConfigEntityBundleBase;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\taxonomy\VocabularyInterface;
 
@@ -45,7 +44,6 @@
  * )
  */
 class Vocabulary extends ConfigEntityBundleBase implements VocabularyInterface {
-  use ThirdPartySettingsTrait;
 
   /**
    * The taxonomy vocabulary ID.
diff --git a/core/tests/Drupal/Tests/Core/Config/Entity/Fixtures/ConfigEntityBaseWithThirdPartySettings.php b/core/tests/Drupal/Tests/Core/Config/Entity/Fixtures/ConfigEntityBaseWithThirdPartySettings.php
index 6834e63..100999c 100644
--- a/core/tests/Drupal/Tests/Core/Config/Entity/Fixtures/ConfigEntityBaseWithThirdPartySettings.php
+++ b/core/tests/Drupal/Tests/Core/Config/Entity/Fixtures/ConfigEntityBaseWithThirdPartySettings.php
@@ -9,7 +9,6 @@
 
 use Drupal\Core\Config\Entity\ConfigEntityBase;
 use Drupal\Core\Config\Entity\ThirdPartySettingsInterface;
-use Drupal\Core\Config\Entity\ThirdPartySettingsTrait;
 
 /**
  * Enables testing of dependency calculation.
@@ -18,6 +17,5 @@
  * @see \Drupal\Core\Config\Entity\ConfigEntityBase::calculateDependencies()
  */
 abstract class ConfigEntityBaseWithThirdPartySettings extends ConfigEntityBase implements ThirdPartySettingsInterface {
-  use ThirdPartySettingsTrait;
 
 }