message: Get rid of support for legacy login params
diff: Copyright 2015, 2016 OpenMarket Ltd
  Copyright 2017 Vector Creations Ltd
  Copyright 2018 New Vector Ltd
  +Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  @@ -87,32 +88,23 @@ export default class Login {
  const isEmail = username.indexOf("@") > 0;
  let identifier;
  - let legacyParams; // parameters added to support old HSes
  if (phoneCountry && phoneNumber) {
  identifier = {
  type: 'm.id.phone',
  country: phoneCountry,
  number: phoneNumber,
  };
  - // No legacy support for phone number login
  } else if (isEmail) {
  identifier = {
  type: 'm.id.thirdparty',
  medium: 'email',
  address: username,
  };
  - legacyParams = {
  - medium: 'email',
  - address: username,
  - };
  } else {
  identifier = {
  type: 'm.id.user',
  user: username,
  };
  - legacyParams = {
  - user: username,
  - };
  }
  const loginParams = {
  @@ -120,7 +112,6 @@ export default class Login {
  identifier: identifier,
  initial_device_display_name: this._defaultDeviceDisplayName,
  };
  - Object.assign(loginParams, legacyParams);
  const tryFallbackHs = (originalError) => {
  return sendLoginRequest(
  