diff --git a/resources/sql/autopatches/20140218.passwords.4.vcs.php b/resources/sql/autopatches/20140218.passwords.4.vcs.php
--- a/resources/sql/autopatches/20140218.passwords.4.vcs.php
+++ b/resources/sql/autopatches/20140218.passwords.4.vcs.php
@@ -1,27 +1,13 @@
 <?php
 
-$table = new PhabricatorRepositoryVCSPassword();
-$conn_w = $table->establishConnection('w');
+// This migration once upgraded VCS password hashing, but the table was
+// later removed in 2018 (see T13043).
 
-echo pht('Upgrading password hashing for VCS passwords.')."\n";
+// Since almost four years have passed since this migration, the cost of
+// losing this data is very small (users just need to reset their passwords),
+// and a version of this migration against the modern schema isn't easy to
+// implement or test, just skip the migration.
 
-$best_hasher = PhabricatorPasswordHasher::getBestHasher();
-foreach (new LiskMigrationIterator($table) as $password) {
-  $id = $password->getID();
-
-  echo pht('Migrating VCS password %d...', $id)."\n";
-
-  $input_hash = $password->getPasswordHash();
-  $input_envelope = new PhutilOpaqueEnvelope($input_hash);
-
-  $storage_hash = $best_hasher->getPasswordHashForStorage($input_envelope);
-
-  queryfx(
-    $conn_w,
-    'UPDATE %T SET passwordHash = %s WHERE id = %d',
-    $table->getTableName(),
-    $storage_hash->openEnvelope(),
-    $id);
-}
-
-echo pht('Done.')."\n";
+// This means that installs which upgrade from a version of Phabricator
+// released prior to Feb 2014 to a version of Phabricator relased after
+// Jan 2018 will need to have users reset VCS passwords.
diff --git a/resources/sql/autopatches/20180121.auth.01.vcsnuke.sql b/resources/sql/autopatches/20180121.auth.01.vcsnuke.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20180121.auth.01.vcsnuke.sql
@@ -0,0 +1 @@
+DROP TABLE {$NAMESPACE}_repository.repository_vcspassword;
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -3944,7 +3944,6 @@
     'PhabricatorRepositoryURITestCase' => 'applications/repository/storage/__tests__/PhabricatorRepositoryURITestCase.php',
     'PhabricatorRepositoryURITransaction' => 'applications/repository/storage/PhabricatorRepositoryURITransaction.php',
     'PhabricatorRepositoryURITransactionQuery' => 'applications/repository/query/PhabricatorRepositoryURITransactionQuery.php',
-    'PhabricatorRepositoryVCSPassword' => 'applications/repository/storage/PhabricatorRepositoryVCSPassword.php',
     'PhabricatorRepositoryWorkingCopyVersion' => 'applications/repository/storage/PhabricatorRepositoryWorkingCopyVersion.php',
     'PhabricatorRequestExceptionHandler' => 'aphront/handler/PhabricatorRequestExceptionHandler.php',
     'PhabricatorResourceSite' => 'aphront/site/PhabricatorResourceSite.php',
@@ -9593,7 +9592,6 @@
     'PhabricatorRepositoryURITestCase' => 'PhabricatorTestCase',
     'PhabricatorRepositoryURITransaction' => 'PhabricatorApplicationTransaction',
     'PhabricatorRepositoryURITransactionQuery' => 'PhabricatorApplicationTransactionQuery',
-    'PhabricatorRepositoryVCSPassword' => 'PhabricatorRepositoryDAO',
     'PhabricatorRepositoryWorkingCopyVersion' => 'PhabricatorRepositoryDAO',
     'PhabricatorRequestExceptionHandler' => 'AphrontRequestExceptionHandler',
     'PhabricatorResourceSite' => 'PhabricatorSite',
diff --git a/src/applications/repository/storage/PhabricatorRepositoryVCSPassword.php b/src/applications/repository/storage/PhabricatorRepositoryVCSPassword.php
deleted file mode 100644
--- a/src/applications/repository/storage/PhabricatorRepositoryVCSPassword.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-
-final class PhabricatorRepositoryVCSPassword extends PhabricatorRepositoryDAO {
-
-  protected $id;
-  protected $userPHID;
-  protected $passwordHash;
-
-  protected function getConfiguration() {
-    return array(
-      self::CONFIG_COLUMN_SCHEMA => array(
-        'passwordHash' => 'text128',
-      ),
-      self::CONFIG_KEY_SCHEMA => array(
-        'key_phid' => array(
-          'columns' => array('userPHID'),
-          'unique' => true,
-        ),
-      ),
-    ) + parent::getConfiguration();
-  }
-
-  public function setPassword(
-    PhutilOpaqueEnvelope $password,
-    PhabricatorUser $user) {
-    $hash_envelope = $this->hashPassword($password, $user);
-    return $this->setPasswordHash($hash_envelope->openEnvelope());
-  }
-
-  public function comparePassword(
-    PhutilOpaqueEnvelope $password,
-    PhabricatorUser $user) {
-
-    return PhabricatorPasswordHasher::comparePassword(
-      $this->getPasswordHashInput($password, $user),
-      new PhutilOpaqueEnvelope($this->getPasswordHash()));
-  }
-
-  private function getPasswordHashInput(
-    PhutilOpaqueEnvelope $password,
-    PhabricatorUser $user) {
-    if ($user->getPHID() != $this->getUserPHID()) {
-      throw new Exception(pht('User does not match password user PHID!'));
-    }
-
-    $raw_input = PhabricatorHash::digestPassword($password, $user->getPHID());
-    return new PhutilOpaqueEnvelope($raw_input);
-  }
-
-  private function hashPassword(
-    PhutilOpaqueEnvelope $password,
-    PhabricatorUser $user) {
-
-    $input_envelope = $this->getPasswordHashInput($password, $user);
-
-    $best_hasher = PhabricatorPasswordHasher::getBestHasher();
-    return $best_hasher->getPasswordHashForStorage($input_envelope);
-  }
-
-}