Remove access to htpassword custom field

It is retired and is no longer in use, replaced with the auth_provider.

scripts/svnauth/rebuild_svnauth.php

@@ -27,20 +27,8 @@ function handleSingleUserPHID(
 
   $user_name = $user->getUserName();
   if (!array_key_exists($user_name, $authfile)) {
-    $field_list = PhabricatorCustomField::getObjectFields(
-      $user,
-      PhabricatorCustomField::ROLE_STORAGE);
-    $field_list
-      ->setViewer($user)
-      ->readFieldsFromStorage($user);
-    $fields = $field_list->getFields();
-    $htaccess_field = idx($fields, 'std:user:htaccess_password_hash');
-    if ($htaccess_field) {
-      $password_hash = $htaccess_field->getValueForStorage();
-      $authfile[$user_name] = array('hash' => $password_hash,
-                                    'email' => $user->loadPrimaryEmailAddress(),
-                                    'name' => $user->getRealName());
-    }
+    $authfile[$user_name] = array('email' => $user->loadPrimaryEmailAddress(),
+                                  'name' => $user->getRealName());
   }
 
   $repository_name = getSVNRepositoryName($repository);