(PECL inotify >= 0.1.2)
inotify_rm_watch — Remove an existing watch from an inotify instance
$inotify_instance, int $watch_descriptor): bool
   inotify_rm_watch() removes the watch
   watch_descriptor from the inotify instance
   inotify_instance.
  
inotify_instanceResource returned by inotify_init()
watch_descriptorWatch to remove from the instance
   Returns true on success or false on failure.