Always use expression when referencing endpoint port in environment v…

…ariable

src/Aspire.Hosting/ApplicationModel/EndpointReference.cs

@@ -184,12 +184,6 @@ public class EndpointReferenceExpression(EndpointReference endpointReference, En
 
     private string? ComputeTargetPort()
     {
-        // We have a target port, so we can return it directly.
-        if (Endpoint.TargetPort is int port)
-        {
-            return port.ToString(CultureInfo.InvariantCulture);
-        }
-
         // There is no way to resolve the value of the target port until runtime. Even then, replicas make this very complex because
         // the target port is not known until the replica is allocated.
         // Instead, we return an expression that will be resolved at runtime by the orchestrator.