deprecates PayloadType since it has only 1 option.

grpc/testing/messages.proto

@@ -29,22 +29,10 @@ message BoolValue {
   bool value = 1;
 }
 
-// The type of payload that should be returned.
-enum PayloadType {
-  // Compressable text format.
-  COMPRESSABLE = 0;
-
-  // Uncompressable binary format.
-  UNCOMPRESSABLE = 1;
-
-  // Randomly chosen from all other formats defined in this enum.
-  RANDOM = 2;
-}
-
 // A block of data, to simply increase gRPC message size.
 message Payload {
-  // The type of data in body.
-  PayloadType type = 1;
+  reserved 1;
+
   // Primary contents of payload.
   bytes body = 2;
 }
@@ -58,9 +46,7 @@ message EchoStatus {
 
 // Unary request.
 message SimpleRequest {
-  // Desired payload type in the response from the server.
-  // If response_type is RANDOM, server randomly chooses one from other formats.
-  PayloadType response_type = 1;
+  reserved 1;
 
   // Desired payload size in the response from the server.
   int32 response_size = 2;
@@ -140,11 +126,7 @@ message ResponseParameters {
 
 // Server-streaming request.
 message StreamingOutputCallRequest {
-  // Desired payload type in the response from the server.
-  // If response_type is RANDOM, the payload from each response in the stream
-  // might be of different types. This is to simulate a mixed type of payload
-  // stream.
-  PayloadType response_type = 1;
+  reserved 1;
 
   // Configuration for each expected response message.
   repeated ResponseParameters response_parameters = 2;