Drop issue 527 TODOs for interop specification

The UnaryCall interop test is now adequately specified in
doc/interop-test-descriptions.md.

src/csharp/Grpc.IntegrationTesting/proto/test.proto

@@ -44,7 +44,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).

src/node/interop/test.proto

@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).

src/objective-c/examples/RemoteTestClient/test.proto

@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).

src/objective-c/generated_libraries/RemoteTestClient/test.proto

@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).

src/php/tests/interop/test.proto

@@ -44,7 +44,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.EmptyMessage) returns (grpc.testing.EmptyMessage);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).

test/proto/test.proto

@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).