Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/type.proto

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 18 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 syntax = "proto3";
 
 package google.protobuf;
 
 import "google/protobuf/any.proto";
 import "google/protobuf/source_context.proto";
 
 option csharp_namespace = "Google.Protobuf.WellKnownTypes";
-option cc_enable_arenas = true;
 option java_package = "com.google.protobuf";
 option java_outer_classname = "TypeProto";
 option java_multiple_files = true;
+option java_generate_equals_and_hash = true;
 option objc_class_prefix = "GPB";
-option go_package = "google.golang.org/genproto/protobuf/ptype;ptype";
 
 // A protocol buffer message type.
 message Type {
   // The fully qualified message name.
   string name = 1;
   // The list of fields.
   repeated Field fields = 2;
   // The list of types appearing in `oneof` definitions in this type.
   repeated string oneofs = 3;
   // The protocol buffer options.
@@ skipping 117 matching lines @@
   Any value = 2;
 }
 
 // The syntax in which a protocol buffer element is defined.
 enum Syntax {
   // Syntax `proto2`.
   SYNTAX_PROTO2 = 0;
   // Syntax `proto3`.
   SYNTAX_PROTO3 = 1;
 }