remove deprecated DEBUG flag in debian package

debian/aegir-hostmaster2.config

@@ -5,7 +5,7 @@ set -e
 # Source debconf library.
 . /usr/share/debconf/confmodule
 
-if [ "$DPKG_DEBUG" = "developer" ] || [ ! -z "$DEBUG" ]; then
+if [ "$DPKG_DEBUG" = "developer" ]; then
     set -x
 fi
 

debian/aegir-hostmaster2.postinst

@@ -20,7 +20,7 @@ set -e
 # Source debconf library.
 . /usr/share/debconf/confmodule
 
-if [ "$DPKG_DEBUG" = "developer" ] || [ ! -z "$DEBUG" ]; then
+if [ "$DPKG_DEBUG" = "developer" ]; then
     set -x
 fi
 
@@ -34,7 +34,7 @@ case "$1" in
         VERSION=`sed -n '/^version/{s/^.*= *//;p}' /usr/share/drush/commands/provision/provision.info`
 
         FLAGS="--yes"
-        if [ "$DPKG_DEBUG" = "developer" ] || [ ! -z "$DEBUG" ]; then
+        if [ "$DPKG_DEBUG" = "developer" ]; then
             FLAGS="$FLAGS --debug"
         fi
         db_get "aegir/makefile"

debian/aegir-provision2.postinst

@@ -20,7 +20,7 @@ set -e
 # Source debconf library.
 . /usr/share/debconf/confmodule
 
-if [ "$DPKG_DEBUG" = "developer" ] || [ ! -z "$DEBUG" ]; then
+if [ "$DPKG_DEBUG" = "developer" ]; then
     set -x
 fi
 

debian/aegir-provision2.postrm

@@ -18,7 +18,7 @@ set -e
 # for details, see http://www.debian.org/doc/debian-policy/ or
 # the debian-policy package
 
-if [ "$DPKG_DEBUG" = "developer" ] || [ ! -z "$DEBUG" ]; then
+if [ "$DPKG_DEBUG" = "developer" ]; then
     set -x
 fi