merge: fix: don't create duplicate workers when clustering is disabled (!508)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/508

Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <marie@kaifa.ch>

packages/backend/src/boot/entry.ts

@@ -75,7 +75,7 @@ async function main() {
 			ev.mount();
 		}
 	}
-	if (cluster.isWorker || envOption.disableClustering) {
+	if (cluster.isWorker) {
 		await workerMain();
 	}