VOL-3244 - remove device discovery topic

this was only used by affinity routing in conjunction
with compete model. it was removed as not being used
by anything else.

Change-Id: Ie7c611c0bc8c301ce3c01d434a06fc9fe73a5d32
diff --git a/pkg/mocks/kafka/kafka_inter_container_proxy.go b/pkg/mocks/kafka/kafka_inter_container_proxy.go
index 34aec95..bf8582d 100644
--- a/pkg/mocks/kafka/kafka_inter_container_proxy.go
+++ b/pkg/mocks/kafka/kafka_inter_container_proxy.go
@@ -18,6 +18,7 @@
 
 import (
 	"context"
+
 	"github.com/gogo/protobuf/proto"
 	"github.com/golang/protobuf/ptypes"
 	"github.com/golang/protobuf/ptypes/any"
@@ -61,9 +62,7 @@
 	return &t
 }
 func (s *MockKafkaICProxy) DeleteTopic(topic kafka.Topic) error { return nil }
-func (s *MockKafkaICProxy) DeviceDiscovered(deviceId string, deviceType string, parentId string, publisher string) error {
-	return nil
-}
+
 func (s *MockKafkaICProxy) Stop() {}
 
 func (s *MockKafkaICProxy) InvokeAsyncRPC(ctx context.Context, rpc string, toTopic *kafka.Topic, replyToTopic *kafka.Topic,