Issue #2801851 by shashikant_chauhan, Yogesh Pawar, phenaproxima, mikeryan:...

Issue #2801851 by shashikant_chauhan, Yogesh Pawar, phenaproxima, mikeryan: Remove system-of-record APIs from migrate

core/modules/migrate/src/Plugin/Migration.php

@@ -125,18 +125,6 @@ class Migration extends PluginBase implements MigrationInterface, RequirementsIn
    */
   protected $destinationIds = [];
 
-  /**
-   * Indicate whether the primary system of record for this migration is the
-   * source, or the destination (Drupal). In the source case, migration of
-   * an existing object will completely replace the Drupal object with data from
-   * the source side. In the destination case, the existing Drupal object will
-   * be loaded, then changes from the source applied; also, rollback will not be
-   * supported.
-   *
-   * @var string
-   */
-  protected $systemOfRecord = self::SOURCE;
-
   /**
    * Specify value of source_row_status for current map row. Usually set by
    * MigrateFieldHandler implementations.
@@ -594,21 +582,6 @@ public function mergeProcessOfProperty($property, array $process_of_property) {
     return $this;
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function getSystemOfRecord() {
-    return $this->systemOfRecord;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function setSystemOfRecord($system_of_record) {
-    $this->systemOfRecord = $system_of_record;
-    return $this;
-  }
-
   /**
    * {@inheritdoc}
    */

core/modules/migrate/src/Plugin/MigrationInterface.php

@@ -10,16 +10,6 @@
  */
 interface MigrationInterface extends PluginInspectionInterface, DerivativeInspectionInterface {
 
-  /**
-   * A constant used for systemOfRecord.
-   */
-  const SOURCE = 'source';
-
-  /**
-   * A constant used for systemOfRecord.
-   */
-  const DESTINATION = 'destination';
-
   /**
    * The migration is currently not running.
    */
@@ -263,24 +253,6 @@ public function setProcessOfProperty($property, $process_of_property);
    */
   public function mergeProcessOfProperty($property, array $process_of_property);
 
-  /**
-   * Get the current system of record of the migration.
-   *
-   * @return string
-   *   The current system of record of the migration.
-   */
-  public function getSystemOfRecord();
-
-  /**
-   * Set the system of record for the migration.
-   *
-   * @param string $system_of_record
-   *   The system of record of the migration.
-   *
-   * @return $this
-   */
-  public function setSystemOfRecord($system_of_record);
-
   /**
    * Checks if the migration should track time of last import.
    *