diff --git a/modules/commerce/src/Plugin/migrate/OrderItemDeriver.php b/modules/commerce/src/Plugin/migrate/OrderItemDeriver.php
index c5bae99..f27f295 100644
--- a/modules/commerce/src/Plugin/migrate/OrderItemDeriver.php
+++ b/modules/commerce/src/Plugin/migrate/OrderItemDeriver.php
@@ -72,7 +72,6 @@ class OrderItemDeriver extends DeriverBase implements ContainerDeriverInterface
    * {@inheritdoc}
    */
   public function getDerivativeDefinitions($base_plugin_definition) {
-    // @todo Convert to new trait. See https://www.drupal.org/node/2951550.
     $order_item_types = static::getSourcePlugin('commerce1_order_item_type');
     try {
       $order_item_types->checkRequirements();
@@ -84,24 +83,6 @@ class OrderItemDeriver extends DeriverBase implements ContainerDeriverInterface
       return parent::getDerivativeDefinitions($base_plugin_definition);
     }
 
-    $fields = [];
-    try {
-      $source_plugin = static::getSourcePlugin('d7_field_instance');
-      $source_plugin->checkRequirements();
-
-      // Read all field instance definitions in the source database.
-      foreach ($source_plugin as $row) {
-        if ($row->getSourceProperty('entity_type') == 'commerce_line_item') {
-          $fields[$row->getSourceProperty('bundle')][$row->getSourceProperty('field_name')] = $row->getSource();
-        }
-      }
-    }
-    catch (RequirementsException $e) {
-      // If checkRequirements() failed then the field module did not exist and
-      // we do not have any fields. Therefore, $fields will be empty and below
-      // we'll create a migration just for the line item properties.
-    }
-
     try {
       foreach ($order_item_types as $row) {
         $line_item_type = $row->getSourceProperty('type');
diff --git a/modules/commerce/src/Plugin/migrate/ProductDeriver.php b/modules/commerce/src/Plugin/migrate/ProductDeriver.php
index 0bd3e2e..4dd7a11 100644
--- a/modules/commerce/src/Plugin/migrate/ProductDeriver.php
+++ b/modules/commerce/src/Plugin/migrate/ProductDeriver.php
@@ -83,24 +83,6 @@ class ProductDeriver extends DeriverBase implements ContainerDeriverInterface {
       return $this->derivatives;
     }
 
-    $fields = [];
-    try {
-      $source_plugin = static::getSourcePlugin('d7_field_instance');
-      $source_plugin->checkRequirements();
-
-      // Read all field instance definitions in the source database.
-      foreach ($source_plugin as $row) {
-        if ($row->getSourceProperty('entity_type') == 'node') {
-          $fields[$row->getSourceProperty('bundle')][$row->getSourceProperty('field_name')] = $row->getSource();
-        }
-      }
-    }
-    catch (RequirementsException $e) {
-      // If checkRequirements() failed then the field module did not exist and
-      // we do not have any fields. Therefore, $fields will be empty and below
-      // we'll create a migration just for the product properties.
-    }
-
     try {
       foreach ($product_types as $row) {
         $product_type = $row->getSourceProperty('type');
diff --git a/modules/commerce/src/Plugin/migrate/ProductVariationDeriver.php b/modules/commerce/src/Plugin/migrate/ProductVariationDeriver.php
index 27f80cc..0f9068f 100644
--- a/modules/commerce/src/Plugin/migrate/ProductVariationDeriver.php
+++ b/modules/commerce/src/Plugin/migrate/ProductVariationDeriver.php
@@ -82,24 +82,6 @@ class ProductVariationDeriver extends DeriverBase implements ContainerDeriverInt
       return $this->derivatives;
     }
 
-    $fields = [];
-    try {
-      $source_plugin = static::getSourcePlugin('d7_field_instance');
-      $source_plugin->checkRequirements();
-
-      // Read all field instance definitions in the source database.
-      foreach ($source_plugin as $row) {
-        if ($row->getSourceProperty('entity_type') == 'commerce_product') {
-          $fields[$row->getSourceProperty('bundle')][$row->getSourceProperty('field_name')] = $row->getSource();
-        }
-      }
-    }
-    catch (RequirementsException $e) {
-      // If checkRequirements() failed then the field module did not exist and
-      // we do not have any fields. Therefore, $fields will be empty and below
-      // we'll create a migration just for the node properties.
-    }
-
     try {
       foreach ($product_variation_types as $row) {
         $product_variation_type = $row->getSourceProperty('type');
diff --git a/modules/commerce/src/Plugin/migrate/ProfileDeriver.php b/modules/commerce/src/Plugin/migrate/ProfileDeriver.php
index 3c20383..5370141 100644
--- a/modules/commerce/src/Plugin/migrate/ProfileDeriver.php
+++ b/modules/commerce/src/Plugin/migrate/ProfileDeriver.php
@@ -83,24 +83,6 @@ class ProfileDeriver extends DeriverBase implements ContainerDeriverInterface {
       return $this->derivatives;
     }
 
-    $fields = [];
-    try {
-      $source_plugin = static::getSourcePlugin('d7_field_instance');
-      $source_plugin->checkRequirements();
-
-      // Read all field instance definitions in the source database.
-      foreach ($source_plugin as $row) {
-        if ($row->getSourceProperty('entity_type') == 'commerce_customer_profile') {
-          $fields[$row->getSourceProperty('bundle')][$row->getSourceProperty('field_name')] = $row->getSource();
-        }
-      }
-    }
-    catch (RequirementsException $e) {
-      // If checkRequirements() failed then the field module did not exist and
-      // we do not have any fields. Therefore, $fields will be empty and below
-      // we'll create a migration just for the profile properties.
-    }
-
     try {
       foreach ($profile_types as $row) {
         $profile_type = $row->getSourceProperty('type');