remove header

Author: lucy66hw

tools/proto-convert/src/config/protobuf-schema-template/model.mustache

@@ -1,7 +1,4 @@
 {{>partial_header}}
-syntax = "proto3";
-
-package {{#lambda.lowercase}}{{{packageName}}};{{/lambda.lowercase}}
 
 {{#imports}}
 {{#import}}

tools/proto-convert/src/config/protobuf-schema-template/partial_header.mustache

@@ -4,8 +4,6 @@
 syntax = "proto3";
 package org.opensearch.protobufs;
 
-import "google/protobuf/struct.proto";
-
 option go_package = "github.com/opensearch-project/opensearch-protobufs/go/opensearchpb";
 option java_multiple_files = true;
 option java_outer_classname = "CommonProto";