Merge "Remove dead code."

namespace {

void init_subproc_child()

{

    setsid();

    // Set OOM score adjustment to prevent killing

    int fd = adb_open("/proc/self/oom_score_adj", O_WRONLY | O_CLOEXEC);

    if (fd >= 0) {

        adb_write(fd, "0", 1);

        adb_close(fd);

    } else {

       D("adb: unable to update oom_score_adj");

    }

}

// Reads from |fd| until close or failure.

std::string ReadAll(int fd) {

    char buffer[512];

    if (pid_ == 0) {

        // Subprocess child.

        init_subproc_child();

        setsid();

        if (type_ == SubprocessType::kPty) {

            child_stdinout_sfd.reset(OpenPtyChildFd(pts_name, &child_error_sfd));