Issue #3157975 by S_Bhandari, paulocs, quietone: Remove Unused variables from Migrate Drupal module

core/modules/migrate_drupal/tests/src/Unit/source/DrupalSqlBaseTest.php

@@ -50,7 +50,6 @@ public function testSourceProviderNotActive() {
     $entity_type_manager = $this->createMock('Drupal\Core\Entity\EntityTypeManagerInterface');
     $plugin = new TestDrupalSqlBase([], 'placeholder_id', $plugin_definition, $this->getMigration(), $state, $entity_type_manager);
     $plugin->setDatabase($this->getDatabase($this->databaseContents));
-    $system_data = $plugin->getSystemData();
     $this->expectException(RequirementsException::class);
     $this->expectExceptionMessage('The module module1 is not enabled in the source site.');
     try {
@@ -75,7 +74,6 @@ public function testSourceDatabaseError() {
     /** @var \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager */
     $entity_type_manager = $this->createMock('Drupal\Core\Entity\EntityTypeManagerInterface');
     $plugin = new TestDrupalSqlBase([], 'test', $plugin_definition, $this->getMigration(), $state, $entity_type_manager);
-    $system_data = $plugin->getSystemData();
     $this->expectException(RequirementsException::class);
     $this->expectExceptionMessage('No database connection configured for source plugin test');
     $plugin->checkRequirements();