diff --git a/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php b/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
index 322b35631a6887f4310c9b7474d94fb4c4056835..6b1fc1b398c2746e9da0267a61a833e4694ac1c0 100644
--- a/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
+++ b/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
@@ -526,10 +526,6 @@ class MigrateUpgradeForm extends ConfirmFormBase {
'source_module' => 'taxonomy',
'destination_module' => 'taxonomy',
],
- 'd6_i18n_taxonomy_vocabulary' => [
- 'source_module' => 'i18n',
- 'destination_module' => 'taxonomy',
- ],
'd6_term_node' => [
'source_module' => 'taxonomy',
'destination_module' => 'taxonomy',
diff --git a/core/modules/taxonomy/migration_templates/d6_i18n_taxonomy_vocabulary.yml b/core/modules/taxonomy/migration_templates/d6_i18n_taxonomy_vocabulary.yml
deleted file mode 100644
index 2e4401953e7da599f82bfcc6af1262bdf7b6d695..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/migration_templates/d6_i18n_taxonomy_vocabulary.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-id: d6_i18n_taxonomy_vocabulary
-label: Taxonomy vocabularies
-migration_tags:
- - Drupal 6
-source:
- plugin: d6_i18n_taxonomy_vocabulary
-process:
- vid:
- -
- plugin: machine_name
- source: name
- -
- plugin: substr
- length: 32
- langcode: language
- property:
- plugin: static_map
- source: property
- map:
- name: name
- description: description
- translation: translation
-destination:
- plugin: entity:taxonomy_vocabulary
-migration_dependencies:
- required:
- - d6_taxonomy_vocabulary
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d6/I18nTaxonomyVocabulary.php b/core/modules/taxonomy/src/Plugin/migrate/source/d6/I18nTaxonomyVocabulary.php
deleted file mode 100644
index 1a102a9d313176f5046e83c9fe7266dc0a8dda45..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d6/I18nTaxonomyVocabulary.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-
-namespace Drupal\taxonomy\Plugin\migrate\source\d6;
-
-use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
-
-/**
- * Profile field source from database.
- *
- * @MigrateSource(
- * id = "d6_i18n_taxonomy_vocabulary",
- * source_provider = "taxonomy"
- * )
- */
-class I18nTaxonomyVocabulary extends DrupalSqlBase {
-
- /**
- * The source table containing profile field info.
- *
- * @var string
- */
- protected $fieldTable;
-
- /**
- * The source table containing the profile values.
- *
- * @var string
- */
- protected $valueTable;
-
- /**
- * {@inheritdoc}
- */
- public function query() {
- $query = $this->select('vocabulary', 'v')
- ->fields('v', ['vid', 'name', 'description'])
- ->fields('i18n', ['lid', 'type', 'property', 'objectid'])
- ->fields('lt', ['lid', 'translation'])
- ->condition('i18n.type', 'vocabulary');
- $query->addField('lt', 'language', 'language');
- $query->join('i18n_strings', 'i18n', 'i18n.objectid = v.vid');
- $query->leftJoin('locales_target', 'lt', 'lt.lid = i18n.lid');
-
- return $query;
- }
- /**
- * {@inheritdoc}
- */
- public function fields() {
- return [
- 'vid' => $this->t('The vocabulary ID.'),
- 'language' => $this->t('Language for this field.'),
- 'property' => $this->t('Name of property being translated.'),
- 'translation' => $this->t('Translation of either the title or explanation.')
- ];
- }
-
- /**
- * {@inheritdoc}
- */
- public function getIds() {
- $ids['vid']['type'] = 'integer';
- return $ids;
- }
-
-}
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateI18nTaxonomyVocabularyTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateI18nTaxonomyVocabularyTest.php
deleted file mode 100644
index 02218c345e3e4e51b4ed142a3de8c93a1b753c2e..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d6/MigrateI18nTaxonomyVocabularyTest.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-namespace Drupal\Tests\taxonomy\Kernel\Migrate\d6;
-
-use Drupal\Tests\migrate_drupal\Kernel\d6\MigrateDrupal6TestBase;
-
-/**
- * Migrate taxonomy vocabularies to taxonomy.vocabulary.*.yml.
- *
- * @group migrate_drupal_6
- */
-class MigrateI18nTaxonomyVocabularyTest extends MigrateDrupal6TestBase {
-
- /**
- * {@inheritdoc}
- */
- public static $modules = ['language', 'taxonomy'];
-
- /**
- * {@inheritdoc}
- */
- protected function setUp() {
- parent::setUp();
- $this->executeMigrations([
- 'd6_taxonomy_vocabulary',
- 'd6_i18n_taxonomy_vocabulary',
- ]);
- }
-
- /**
- * Tests the Drupal 6 i18n taxonomy vocabularies to Drupal 8 migration.
- */
- public function testI18nTaxonomyVocabulary() {
- $language_manager = \Drupal::service('language_manager');
- $config = $language_manager->getLanguageConfigOverride('fr', 'taxonomy.vocabulary.vocabulary_1_i_0_');
- $this->assertSame('fr - vocabulary 1 (i=0)', $config->get('name'));
- $config = $language_manager->getLanguageConfigOverride('fr', 'taxonomy.vocabulary.vocabulary_2_i_1_');
- $this->assertSame('fr - vocabulary 2 (i=1)', $config->get('name'));
- $config = $language_manager->getLanguageConfigOverride('fr', 'taxonomy.vocabulary.vocabulary_3_i_2_');
- $this->assertSame('fr - vocabulary 3 (i=2)', $config->get('name'));
- $config = $language_manager->getLanguageConfigOverride('fr', 'taxonomy.vocabulary.vocabulary_name_much_longer_than');
- $this->assertSame('Nom de vocabulaire beaucoup plus long que trente-deux caractères', $config->get('name'));
- $config = $language_manager->getLanguageConfigOverride('fr', 'taxonomy.vocabulary.tags');
- $this->assertSame('fr - Tags', $config->get('name'));
- }
-
-}
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/I18nVocabularyTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/I18nVocabularyTest.php
deleted file mode 100644
index 09abe2f221ae83d3cf7daa2f114a681c834b7569..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/I18nVocabularyTest.php
+++ /dev/null
@@ -1,131 +0,0 @@
-<?php
-
-namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d6;
-
-use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
-
-/**
- * Tests D6 i18n vocabulary source plugin.
- *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\I18nTaxonomyVocabulary
- * @group taxonomy
- */
-class I18nVocabularyTest extends MigrateSqlSourceTestBase {
-
- /**
- * {@inheritdoc}
- */
- public static $modules = ['taxonomy', 'migrate_drupal'];
-
- protected $i18n_strings = [
- [
- 'lid' => 1,
- 'objectid' => 1,
- 'type' => 'vocabulary',
- 'property' => 'name',
- 'objectindex' => 1,
- 'format' => 0,
- ],
- [
- 'lid' => 2,
- 'objectid' => 2,
- 'type' => 'vocabulary',
- 'property' => 'name',
- 'objectindex' => 2,
- 'format' => 0,
- ],
- ];
-
- protected $locales_target = [
- [
- 'lid' => 1,
- 'language' => 'fr',
- 'translation' => 'fr - vocabulary 1',
- 'plid' => 0,
- 'plural' => 0,
- 'i18n_status' => 0,
- ],
- [
- 'lid' => 2,
- 'language' => 'fr',
- 'translation' => 'fr - vocabulary 2',
- 'plid' => 0,
- 'plural' => 0,
- 'i18n_status' => 0,
- ],
- ];
-
- protected $vocabulary = [
- [
- 'vid' => 1,
- 'name' => 'vocabulary 1',
- 'description' => 'description of vocabulary 1',
- 'help' => 1,
- 'relations' => 1,
- 'hierarchy' => 1,
- 'multiple' => 0,
- 'required' => 0,
- 'tags' => 0,
- 'module' => 'taxonomy',
- 'weight' => 4,
- 'language' => ''
- ],
- [
- 'vid' => 2,
- 'name' => 'vocabulary 2',
- 'description' => 'description of vocabulary 2',
- 'help' => 1,
- 'relations' => 1,
- 'hierarchy' => 1,
- 'multiple' => 0,
- 'required' => 0,
- 'tags' => 0,
- 'module' => 'taxonomy',
- 'weight' => 5,
- 'language' => ''
- ],
- ];
-
- protected $expectedResults = [
- [
- 'vid' => 1,
- 'name' => 'vocabulary 1',
- 'description' => 'description of vocabulary 1',
- 'lid' => '1',
- 'type' => 'vocabulary',
- 'property' => 'name',
- 'objectid' => '1',
- 'lt_lid' => '1',
- 'translation' => 'fr - vocabulary 1',
- 'language' => 'fr',
- ],
- [
- 'vid' => 2,
- 'name' => 'vocabulary 2',
- 'description' => 'description of vocabulary 2',
- 'lid' => '2',
- 'type' => 'vocabulary',
- 'property' => 'name',
- 'objectid' => '2',
- 'lt_lid' => '2',
- 'translation' => 'fr - vocabulary 2',
- 'language' => 'fr',
- ],
- ];
-
- /**
- * {@inheritdoc}
- */
- public function providerSource() {
- $tests = [];
-
- $tests[0][0]['i18n_strings'] = $this->i18n_strings;
- $tests[0][0]['locales_target'] = $this->locales_target;
- $tests[0][0]['vocabulary'] = $this->vocabulary;
-
- $tests[0][1] = $this->expectedResults;
-
- return $tests;
- }
-
-}