delete clocksd (#30252)

old-commit-hash: 67f2321060321a87082e297151692ed9b36de2c0

system/clocksd/.gitignore

@@ -1 +0,0 @@
-clocksd

system/clocksd/SConscript

@@ -1,2 +0,0 @@
-Import('env', 'common', 'cereal', 'messaging')
-env.Program('clocksd.cc', LIBS=[common, cereal, messaging, 'capnp', 'zmq', 'kj'])

system/clocksd/clocksd.cc

@@ -1,73 +0,0 @@
-#include <sys/resource.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-#include <cstdint>
-#include <cstdio>
-
-// Apple doesn't have timerfd
-#ifdef __APPLE__
-#include <thread>
-#else
-#include <sys/timerfd.h>
-#endif
-
-#include <cassert>
-#include <chrono>
-
-#include "cereal/messaging/messaging.h"
-#include "common/timing.h"
-#include "common/util.h"
-
-ExitHandler do_exit;
-
-int main() {
-  setpriority(PRIO_PROCESS, 0, -13);
-  PubMaster pm({"clocks"});
-
-#ifndef __APPLE__
-  int timerfd = timerfd_create(CLOCK_BOOTTIME, 0);
-  assert(timerfd >= 0);
-
-  struct itimerspec spec = {0};
-  spec.it_interval.tv_sec = 1;
-  spec.it_interval.tv_nsec = 0;
-  spec.it_value.tv_sec = 1;
-  spec.it_value.tv_nsec = 0;
-
-  int err = timerfd_settime(timerfd, 0, &spec, 0);
-  assert(err == 0);
-
-  uint64_t expirations = 0;
-  while (!do_exit && (err = read(timerfd, &expirations, sizeof(expirations)))) {
-    if (err < 0) {
-      if (errno == EINTR) continue;
-      break;
-    }
-#else
-  // Just run at 1Hz on apple
-  while (!do_exit) {
-    util::sleep_for(1000);
-#endif
-
-    uint64_t boottime = nanos_since_boot();
-    uint64_t monotonic = nanos_monotonic();
-    uint64_t monotonic_raw = nanos_monotonic_raw();
-    uint64_t wall_time = nanos_since_epoch();
-
-    MessageBuilder msg;
-    auto clocks = msg.initEvent().initClocks();
-
-    clocks.setBootTimeNanos(boottime);
-    clocks.setMonotonicNanos(monotonic);
-    clocks.setMonotonicRawNanos(monotonic_raw);
-    clocks.setWallTimeNanos(wall_time);
-
-    pm.send("clocks", msg);
-  }
-
-#ifndef __APPLE__
-  close(timerfd);
-#endif
-  return 0;
-}