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/spaces/SpaceCreateMenu.tsx

@@ -109,7 +109,7 @@ export const SpaceFeedbackPrompt = ({ onClick }: { onClick?: () => void }) => {
             kind="link"
             onClick={() => {
                 if (onClick) onClick();
-                Modal.createTrackedDialog("Spaces Feedback", "", GenericFeatureFeedbackDialog, {
+                Modal.createDialog(GenericFeatureFeedbackDialog, {
                     title: _t("Spaces feedback"),
                     subheading: _t("Thank you for trying Spaces. " +
                         "Your feedback will help inform the next versions."),