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/createRoom.ts

@@ -315,7 +315,7 @@ export default async function createRoom(opts: IOpts): Promise<string | null> {
             // the error to the user for if/when the UI is available.
             description = _t("The server does not support the room version specified.");
         }
-        Modal.createTrackedDialog('Failure to create room', '', ErrorDialog, {
+        Modal.createDialog(ErrorDialog, {
             title: _t("Failure to create room"),
             description,
         });