Do not reset outgoing buffer on failsafe path

src/core/lib/iomgr/tcp_posix.cc

@@ -685,7 +685,6 @@ static bool tcp_write_with_timestamps(grpc_tcp* tcp, struct msghdr* msg,
     uint32_t opt = grpc_core::kTimestampingSocketOptions;
     if (setsockopt(tcp->fd, SOL_SOCKET, SO_TIMESTAMPING,
                    static_cast<void*>(&opt), sizeof(opt)) != 0) {
-      grpc_slice_buffer_reset_and_unref_internal(tcp->outgoing_buffer);
       if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
         gpr_log(GPR_ERROR, "Failed to set timestamping options on the socket.");
       }