Remove reference (#319)

Author: ckittel

choreography/README.md

@@ -2,7 +2,7 @@
 
 The [Choreography cloud design pattern](https://learn.microsoft.com/azure/architecture/patterns/choreography) does not have code associated with it. You'll find an example of this pattern in the Example section of that article.
 
-The scenario presented is how code running in an Azure Container Apps can use a message broker to exchange messages without central coordination to process a business transaction that requires ordered handling of unbounded sequences of related messages. The scenario uses a [Drone Delivery app](https://github.com/mspnp/microservices-reference-implementation).
+The scenario presented is how code running in an Azure Container Apps can use a message broker to exchange messages without central coordination to process a business transaction that requires ordered handling of unbounded sequences of related messages.
 
 ![Diagram of an event driven cloud native example workload implementing choreography pattern](./choreography-example.png)