rm watchdog (#36425)

common/SConscript

@@ -4,7 +4,6 @@ common_libs = [
   'params.cc',
   'swaglog.cc',
   'util.cc',
-  'watchdog.cc',
   'ratekeeper.cc',
   'clutil.cc',
 ]

common/watchdog.cc

@@ -1,12 +0,0 @@
-#include <string>
-
-#include "common/watchdog.h"
-#include "common/util.h"
-#include "system/hardware/hw.h"
-
-const std::string watchdog_fn_prefix = Path::shm_path() + "/wd_";  // + <pid>
-
-bool watchdog_kick(uint64_t ts) {
-  static std::string fn = watchdog_fn_prefix + std::to_string(getpid());
-  return util::write_file(fn.c_str(), &ts, sizeof(ts), O_WRONLY | O_CREAT) > 0;
-}

common/watchdog.h

@@ -1,5 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-bool watchdog_kick(uint64_t ts);

common/watchdog.py

@@ -1,22 +0,0 @@
-import os
-import time
-import struct
-from openpilot.system.hardware.hw import Paths
-
-WATCHDOG_FN = f"{Paths.shm_path()}/wd_"
-_LAST_KICK = 0.0
-
-def kick_watchdog():
-  global _LAST_KICK
-  current_time = time.monotonic()
-
-  if current_time - _LAST_KICK < 1.0:
-    return
-
-  try:
-    with open(f"{WATCHDOG_FN}{os.getpid()}", 'wb') as f:
-      f.write(struct.pack('<Q', int(current_time * 1e9)))
-      f.flush()
-    _LAST_KICK = current_time
-  except OSError:
-    pass