Delete swapfile generator, haven't used this in a long time.

Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>

advanced/dphys-swapfile

@@ -1,12 +0,0 @@
-# Pi-hole: A black hole for Internet advertisements
-# (c) 2015, 2016 by Jacob Salmela
-# Network-wide ad blocking via your Raspberry Pi
-# http://pi-hole.net
-# Swap file config
-#
-# Pi-hole is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 2 of the License, or
-# (at your option) any later version.
-
-CONF_SWAPSIZE=500