Remove Piwik support (#8835)

* Remove all mentions of Piwik

* Kill off all consumer of the old Piwik Analytics module

* Simplify ModalManager interface

* i18n

* Attempt to fix old e2e tests

* Remove unused component

* Iterate PR

src/components/views/elements/MiniAvatarUploader.tsx

@@ -18,7 +18,6 @@ import classNames from 'classnames';
 import { EventType } from 'matrix-js-sdk/src/@types/event';
 import React, { useContext, useRef, useState, MouseEvent } from 'react';
 
-import Analytics from "../../../Analytics";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import RoomContext from "../../../contexts/RoomContext";
 import { useTimeout } from "../../../hooks/useTimeout";
@@ -74,7 +73,6 @@ const MiniAvatarUploader: React.FC<IProps> = ({
             onChange={async (ev) => {
                 if (!ev.target.files?.length) return;
                 setBusy(true);
-                Analytics.trackEvent("mini_avatar", "upload");
                 const file = ev.target.files[0];
                 const uri = await cli.uploadContent(file);
                 await setAvatarUrl(uri);