[Local card migration] Change the active experiment

We should not include the prompt experiment here because local card
migration doesnot have the required messaging to show the shorten tos.

Bug: 852904
Change-Id: I4c3c7a9bcee1d24a97dbd23dea2924cd3eef1a3b
Reviewed-on: https://chromium-review.googlesource.com/1197370
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587778}

components/autofill/core/browser/local_card_migration_manager.cc

@@ -76,20 +76,13 @@ void LocalCardMigrationManager::AttemptToOfferLocalCardMigration(
   if (!payments_client_)
     return;
   migration_request_ = payments::PaymentsClient::MigrationRequestDetails();
-  std::vector<const char*> active_experiments;
-
-  // Payments server determines which version of the legal message to show based
-  // on the existence of this experiment flag.
-  if (features::IsAutofillUpstreamUpdatePromptExplanationExperimentEnabled()) {
-    active_experiments.push_back(
-        features::kAutofillUpstreamUpdatePromptExplanation.name);
-  }
 
   // Don't send pan_first_six, as potentially migrating multiple local cards at
   // once will negate its usefulness.
   payments_client_->GetUploadDetails(
       std::vector<AutofillProfile>(), GetDetectedValues(),
-      /*pan_first_six=*/std::string(), active_experiments, app_locale_,
+      /*pan_first_six=*/std::string(),
+      /*active_experiments=*/std::vector<const char*>(), app_locale_,
       base::BindOnce(&LocalCardMigrationManager::OnDidGetUploadDetails,
                      weak_ptr_factory_.GetWeakPtr(), is_from_settings_page),
       payments::kMigrateCardsBillableServiceNumber);