Remove useless gprc service.

apm-network/src/main/proto/AggregatedMetricsService.proto

@@ -1,26 +0,0 @@
-syntax = "proto3";
-
-option java_multiple_files = true;
-option java_package = "org.skywalking.apm.network.trace.proto";
-
-import "Downstream.proto";
-
-service AggregatedMetricsService {
-    rpc collect (AggregatedMetrics) returns (Downstream) {
-    }
-}
-
-message AggregatedMetrics {
-    repeated Metric metrics = 1;
-    int32 applicationId = 2;
-    int32 applicationInstanceId = 3;
-}
-
-// In aggregated metric, every operation metric is aggregated in 1 seconds.
-message Metric {
-    int32 operationNameId = 1 ;
-    int32 timeWindow = 2;
-    int32 count = 3;
-    int32 latency = 4; // ms
-    repeated int32 topN = 5;
-}