diff --git a/cmd/gapic-showcase/echo.go b/cmd/gapic-showcase/echo.go
index 413928784..f035594bc 100644
--- a/cmd/gapic-showcase/echo.go
+++ b/cmd/gapic-showcase/echo.go
@@ -59,8 +59,6 @@ func init() {
 
 	EchoCmd.Flags().StringVar(&echoInputOtherRequestId, "other_request_id", "", "To facilitate testing of...")
 
-	EchoCmd.Flags().StringSliceVar(&EchoInput.HttpRequestHeaderToEcho, "http_request_header_to_echo", []string{}, "Http request headers to echo via...")
-
 	EchoCmd.Flags().StringVar(&EchoInputResponse, "response", "", "Choices: content, error")
 
 	EchoCmd.Flags().StringVar(&EchoFromFile, "from_file", "", "Absolute path to JSON file containing request payload")
diff --git a/schema/google/showcase/v1beta1/echo.proto b/schema/google/showcase/v1beta1/echo.proto
index 370139135..0500d3d03 100644
--- a/schema/google/showcase/v1beta1/echo.proto
+++ b/schema/google/showcase/v1beta1/echo.proto
@@ -222,9 +222,6 @@ message EchoRequest {
   optional string other_request_id = 8 [
     (google.api.field_info).format = UUID4
   ];
-
-  // Http request headers to echo via EchoResponse.http_request_header_value
-  repeated string http_request_header_to_echo = 9;
 }
 
 // The response message for the Echo methods.
diff --git a/server/genproto/echo.pb.go b/server/genproto/echo.pb.go
index 8fc2b8520..350d5783e 100644
--- a/server/genproto/echo.pb.go
+++ b/server/genproto/echo.pb.go
@@ -121,8 +121,6 @@ type EchoRequest struct {
 	RequestId string `protobuf:"bytes,7,opt,name=request_id,json=requestId,proto3" json:"request_id,omitempty"`
 	// To facilitate testing of https://google.aip.dev/client-libraries/4235
 	OtherRequestId *string `protobuf:"bytes,8,opt,name=other_request_id,json=otherRequestId,proto3,oneof" json:"other_request_id,omitempty"`
-	// Http request headers to echo via EchoResponse.http_request_header_value
-	HttpRequestHeaderToEcho []string `protobuf:"bytes,9,rep,name=http_request_header_to_echo,json=httpRequestHeaderToEcho,proto3" json:"http_request_header_to_echo,omitempty"`
 }
 
 func (x *EchoRequest) Reset() {
@@ -213,13 +211,6 @@ func (x *EchoRequest) GetOtherRequestId() string {
 	return ""
 }
 
-func (x *EchoRequest) GetHttpRequestHeaderToEcho() []string {
-	if x != nil {
-		return x.HttpRequestHeaderToEcho
-	}
-	return nil
-}
-
 type isEchoRequest_Response interface {
 	isEchoRequest_Response()
 }
@@ -1442,7 +1433,7 @@ var file_google_showcase_v1beta1_echo_proto_rawDesc = []byte{
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@@ -1461,299 +1452,295 @@ var file_google_showcase_v1beta1_echo_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/server/services/echo_service.go b/server/services/echo_service.go
index 710795cd1..8cb2797c5 100644
--- a/server/services/echo_service.go
+++ b/server/services/echo_service.go
@@ -52,17 +52,12 @@ func (s *echoServerImpl) Echo(ctx context.Context, in *pb.EchoRequest) (*pb.Echo
 	md, ok := metadata.FromIncomingContext(ctx)
 	requestHeaders := make(map[string]*pb.EchoResponse_RepeatedValues)
 	if ok {
-		headersToTrack := in.GetHttpRequestHeaderToEcho()
 		for k, v := range md {
-			if strContains(headersToTrack, k) {
-				requestHeaders[k] = &pb.EchoResponse_RepeatedValues{HeaderValues: v}
-			}
+			requestHeaders[k] = &pb.EchoResponse_RepeatedValues{HeaderValues: v}
 		}
 	}
-
 	echoHeaders(ctx)
 	echoTrailers(ctx)
-
 	return &pb.EchoResponse{Content: in.GetContent(), Severity: in.GetSeverity(), RequestId: in.GetRequestId(), OtherRequestId: in.GetOtherRequestId(), HttpRequestHeaderValue: requestHeaders}, nil
 }
 
diff --git a/server/services/echo_service_test.go b/server/services/echo_service_test.go
index 9c71ce1e7..f9fa19d8c 100644
--- a/server/services/echo_service_test.go
+++ b/server/services/echo_service_test.go
@@ -42,9 +42,8 @@ func TestEcho_success(t *testing.T) {
 	server := NewEchoServer()
 	for _, val := range table {
 		in := &pb.EchoRequest{
-			Response:                &pb.EchoRequest_Content{Content: val},
-			Severity:                pb.Severity_CRITICAL,
-			HttpRequestHeaderToEcho: []string{"x-goog-api-version"},
+			Response: &pb.EchoRequest_Content{Content: val},
+			Severity: pb.Severity_CRITICAL,
 		}
 		mockStream := &mockUnaryStream{t: t}
 		ctx := appendTestOutgoingMetadata(context.Background(), &mockSTS{t: t, stream: mockStream})