removed mistaked double project representation

Author: lavedon

end/chapter09/Prometheus/Geolocation.AppHost/Program.cs

@@ -14,7 +14,3 @@
     .WithReference(apApi);
 
 builder.Build().Run();
-
-builder.AddProject<Projects.YarpGateway>("gateway");
-
-builder.Build().Run();

start/chapter09/Prometheus/Geolocation.AppHost/Program.cs

@@ -10,7 +10,3 @@
     .WithReference(apApi);
 
 builder.Build().Run();
-
-builder.AddProject<Projects.YarpGateway>("gateway");
-
-builder.Build().Run();