remove dead code in updated

selfdrive/updated.py

@@ -31,7 +31,6 @@ import signal
 import fcntl
 import time
 import threading
-from cffi import FFI
 from pathlib import Path
 
 from common.basedir import BASEDIR
@@ -52,14 +51,6 @@ OVERLAY_MERGED = os.path.join(STAGING_ROOT, "merged")
 FINALIZED = os.path.join(STAGING_ROOT, "finalized")
 
 
-# Workaround for lack of os.link in the NEOS/termux python
-ffi = FFI()
-ffi.cdef("int link(const char *oldpath, const char *newpath);")
-libc = ffi.dlopen(None)
-def link(src, dest):
-  return libc.link(src.encode(), dest.encode())
-
-
 class WaitTimeHelper:
   def __init__(self, proc):
     self.proc = proc