Delete unused code

src/core/transport/chttp2/frame_data.h

@@ -94,9 +94,6 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-/* create a slice with an empty data frame and is_last set */
-gpr_slice grpc_chttp2_data_frame_create_empty_close(gpr_uint32 id);
-
 void grpc_chttp2_encode_data(gpr_uint32 id, gpr_slice_buffer *inbuf,
                              gpr_uint32 write_bytes, int is_eof,
                              gpr_slice_buffer *outbuf);

src/core/transport/chttp2/hpack_encoder.c

@@ -458,12 +458,6 @@ static void deadline_enc(grpc_chttp2_hpack_compressor *c, gpr_timespec deadline,
   GRPC_MDELEM_UNREF(mdelem);
 }
 
-gpr_slice grpc_chttp2_data_frame_create_empty_close(gpr_uint32 id) {
-  gpr_slice slice = gpr_slice_malloc(9);
-  fill_header(GPR_SLICE_START_PTR(slice), GRPC_CHTTP2_FRAME_DATA, id, 0, 1);
-  return slice;
-}
-
 static gpr_uint32 elems_for_bytes(gpr_uint32 bytes) {
   return (bytes + 31) / 32;
 }