diff --git a/web/app.js b/web/app.js
index 209ad0360..912880dee 100644
--- a/web/app.js
+++ b/web/app.js
@@ -463,14 +463,9 @@ const PDFViewerApplication = {
   async _initializeViewerComponents() {
     const { appConfig, externalServices } = this;
 
-    let eventBus;
-    if (appConfig.eventBus) {
-      eventBus = appConfig.eventBus;
-    } else if (externalServices.isInAutomation) {
-      eventBus = new AutomationEventBus();
-    } else {
-      eventBus = new EventBus();
-    }
+    const eventBus = externalServices.isInAutomation
+      ? new AutomationEventBus()
+      : new EventBus();
     this.eventBus = eventBus;
 
     this.overlayManager = new OverlayManager();
diff --git a/web/viewer.js b/web/viewer.js
index 53fe840ac..ef73a0a2a 100644
--- a/web/viewer.js
+++ b/web/viewer.js
@@ -77,7 +77,6 @@ function getViewerConfiguration() {
     appContainer: document.body,
     mainContainer: document.getElementById("viewerContainer"),
     viewerContainer: document.getElementById("viewer"),
-    eventBus: null,
     toolbar: {
       container: document.getElementById("toolbarViewer"),
       numPages: document.getElementById("numPages"),