[#55024] Remove bugfix that is not required anymore

Since we switched to turbo drive, this bug is not happening anymore, so
the extra stimulus controller and the custom angular event can be
removed.
For more details about the bug see
https://community.openproject.org/wp/55024

frontend/src/app/core/routing/openproject.routes.ts

@@ -195,29 +195,6 @@ export function initializeUiRouterListeners(injector:Injector) {
     (transition) => redirectToMobileAlternative(transition),
   );
 
-  // Fire an event when navigating to a different module. This event then can be detected in
-  // the non-angular parts of the application. A usecase for this can be found in the
-  // overview-header.controllers.ts
-  // See https://community.openproject.org/wp/55024 for details.
-  $transitions.onBefore(
-    {},
-    (transition:Transition) => {
-      const fromState = transition.from();
-      const toState = transition.to();
-      if (
-        !!fromState.name
-        && !!toState.name
-        && fromState.name?.split('.')[0] !== toState.name?.split('.')[0]
-      ) {
-        window.dispatchEvent(new CustomEvent('angular:router:module-changed', {
-          detail: toState.name?.split('.')[0],
-        }));
-      }
-
-      return true;
-    },
-  );
-
   // Apply classes from bodyClasses in each state definition
   // This was defined as onEnter, onExit functions in each state before
   // but since AOT doesn't allow anonymous functions, we can't re-use them now.

modules/overviews/app/views/overviews/overviews/show.html.erb

@@ -3,13 +3,7 @@
 <% end -%>
 
 <%=
-  render(Primer::OpenProject::PageHeader.new(
-    data: {
-      'controller': 'overview-header',
-      'application-target': 'dynamic',
-      turbo: true
-    }
-  )) do |header|
+  render(Primer::OpenProject::PageHeader.new) do |header|
     header.with_title(variant: :medium) { t("overviews.label") }
     header.with_breadcrumbs(
       [