Revert of [System Health] Create first System Health media user stories.

tools/perf/page_sets/login_helpers/pandora_login.py

-# Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-from page_sets.login_helpers import login_utils
-
-
-def LoginAccount(action_runner, credential,
-                 credentials_path=login_utils.DEFAULT_CREDENTIAL_PATH):
-  """Logs in into a Dropbox account.
-
-  This function navigates the tab into Dropbox's login page and logs in a user
-  using credentials in |credential| part of the |credentials_path| file.
-
-  Args:
-    action_runner: Action runner responsible for running actions on the page.
-    credential: The credential to retrieve from the credentials file (string).
-    credentials_path: The path to credential file (string).
-
-  Raises:
-    exceptions.Error: See ExecuteJavaScript()
-    for a detailed list of possible exceptions.
-  """
-  account_name, password = login_utils.GetAccountNameAndPassword(
-      credential, credentials_path=credentials_path)
-
-  action_runner.Navigate('https://www.pandora.com/account/sign-in')
-  login_utils.InputWithSelector(
-      action_runner, account_name, 'input[id=login_username]')
-  login_utils.InputWithSelector(
-      action_runner, password, 'input[id=login_password]')
-
-  login_button_function = ('document.getElementsByClassName('
-                           '"onboarding__form__button onboarding__b1 '
-                           'onboarding__form__button--blue loginButton")[0]')
-  action_runner.ClickElement(element_function=login_button_function)