Removes fullfilled TODO.

New bubble implementation was done in https://crrev.com/319892

BUG=454815
R=vabr@chromium.org

Review URL: https://codereview.chromium.org/1078723002

Cr-Commit-Position: refs/heads/master@{#324423}

chrome/browser/password_manager/chrome_password_manager_client.cc

@@ -229,8 +229,6 @@ bool ChromePasswordManagerClient::PromptUserToSavePassword(
         ManagePasswordsUIController::FromWebContents(web_contents());
     manage_passwords_ui_controller->OnPasswordSubmitted(form_to_save.Pass());
   } else {
-    // TODO(melandory): If type is CREDENTIAL_SOURCE_API then new bubble should
-    // be shown.
     std::string uma_histogram_suffix(
         password_manager::metrics_util::GroupIdToString(
             password_manager::metrics_util::MonitoredDomainGroupId(