Revert "Render mobile sticky ads only if reader revenue banner is absent (#2351)"

This reverts commit a001baf.

Author: dskamiotis

bundle/playwright/tests/mobile-sticky-slot.spec.ts

@@ -1,4 +1,3 @@
-import { log } from '@guardian/libs';
 import { createAdSlot } from '../lib/create-ad-slot';
 import fastdom from '../lib/fastdom-promise';
 import { shouldIncludeMobileSticky } from '../lib/header-bidding/utils';
@@ -32,36 +31,27 @@ const createAdWrapper = () => {
  * Initialise mobile sticky ad slot
  * @returns Promise
  */
-
-const renderMobileStickySlot = async () => {
-	log('commercial', '🪵 Rendering MobileSticky');
-	const mobileStickyWrapper = createAdWrapper();
-	await fastdom.mutate(() => {
-		// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- Is body really always defined?
-		if (document.body && mobileStickyWrapper) {
-			document.body.appendChild(mobileStickyWrapper);
-		}
-	});
-	if (mobileStickyWrapper) {
-		const mobileStickyAdSlot =
-			mobileStickyWrapper.querySelector<HTMLElement>(
-				'#dfp-ad--mobile-sticky',
-			);
-		if (mobileStickyAdSlot) {
-			void fillDynamicAdSlot(mobileStickyAdSlot, true);
-		}
-	}
-};
-
 export const init = (): Promise<void> => {
-	const handleBannerEvent = () => {
-		log('commercial', '🪵 Handle Banner Event');
-		void renderMobileStickySlot();
-	};
-
 	if (shouldIncludeMobileSticky()) {
-		document.addEventListener('banner:close', handleBannerEvent);
-		document.addEventListener('banner:none', handleBannerEvent);
+		const mobileStickyWrapper = createAdWrapper();
+		return fastdom
+			.mutate(() => {
+				// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- Is body really always defined?
+				if (document.body && mobileStickyWrapper) {
+					document.body.appendChild(mobileStickyWrapper);
+				}
+			})
+			.then(() => {
+				if (mobileStickyWrapper) {
+					const mobileStickyAdSlot =
+						mobileStickyWrapper.querySelector<HTMLElement>(
+							'#dfp-ad--mobile-sticky',
+						);
+					if (mobileStickyAdSlot) {
+						void fillDynamicAdSlot(mobileStickyAdSlot, true);
+					}
+				}
+			});
 	}
 
 	return Promise.resolve();