etc/defaults.conf: remove XBPS_{HOST,MASTER}DIR vars.

To use an alternative XBPS_{HOST,MASTER}DIR use -H and -m respectively.

etc/defaults.conf

@@ -13,32 +13,6 @@
 # Please also use ${FOO} style for shell variables because some parsers
 # rely on this to work properly.
 #
-# [REQUIRED]
-# Master directory. This is where the packages are built and installed.
-# By default set to void-packages/masterdir.
-#
-#XBPS_MASTERDIR=${HOME}/masterdir
-
-# [OPTIONAL]
-# Host directory to be (bind) mounted into the chroot (masterdir) containing
-# directories for downloaded cached packages from xbps-install(8), packages
-# created by xbps-src, downloaded source distribution tarballs, etc.
-#
-# Basically your directory will contain this structure:
-#
-# /masterdir
-# |
-# |-----/HOSTDIR
-# 	|- /binpkgs	<- local repository
-# 	|- /repocache	<- cachedir for dependencies
-# 	|- /sources	<- source tarballs
-#
-# When created, those names are constants, so you cannot change them, even
-# they are case sensitive.
-#
-# NOTE: You must create your toplevel /dir yourself
-#
-#XBPS_HOSTDIR=/path/to/your/host/directory
 
 # [OPTIONAL]
 # Enable optional arguments to xbps-install. This is useful when you use