Cleans up add/remove kevent descriptor code
Cleans up add/remove kevent descriptor code

The ``absolute_path`` function was being called
multiple times unnecessarily. Move these calls
to the appropriate places and clean up unnecessary
variable creation when adding and removing
kevent descriptors.

Signed-off-by: Gora Khargosh <a2078c57e3ac12c6dfb97b7c2c4e6d6d7db7e92f@gmail.com>

ymero/watchdog,teleyinex/watchdog,javrasya/watchdog,edevil/watchdog,mconstantin/watchdog,ymero/watchdog,edevil/watchdog,javrasya/watchdog,glorizen/watchdog,edevil/watchdog,glorizen/watchdog,teleyinex/watchdog,gorakhargosh/watchdog,ymero/watchdog,javrasya/watchdog,teleyinex/watchdog,mconstantin/watchdog,mconstantin/watchdog,gorakhargosh/watchdog,edevil/watchdog,edevil/watchdog,glorizen/watchdog