chore(examples): Remove dummy echo implementation (#1178)

examples/proto/unaryecho/echo.proto

@@ -0,0 +1,37 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+ syntax = "proto3";
+
+ package grpc.examples.unaryecho;
+
+ // EchoRequest is the request for echo.
+ message EchoRequest {
+   string message = 1;
+ }
+
+ // EchoResponse is the response for echo.
+ message EchoResponse {
+   string message = 1;
+ }
+
+ // Echo is the echo service.
+ service Echo {
+   // UnaryEcho is unary echo.
+   rpc UnaryEcho(EchoRequest) returns (EchoResponse) {}
+ }