Make Kali Purple installer offline

The package exploitdb-papers was removed from kali-tools-identify in
src:kali-meta 2023.1.11, so there's no need to exclude it here anymore.

As a consequence, no need for the network during installation anymore.

build.sh

@@ -327,8 +327,8 @@ case "$IMAGE_TYPE" in
 			auto_profiles="kali"
 		elif [ "$KALI_VARIANT" = "purple" ]; then
 			export DISKTYPE="BD"
-			profiles="kali kali-purple"
-			auto_profiles="kali kali-purple"
+			profiles="kali kali-purple offline"
+			auto_profiles="kali kali-purple offline"
 			export KERNEL_PARAMS="debian-installer/theme=Clearlooks-Purple"
 		else    # plain installer
 			export DISKTYPE="BD"

simple-cdd/profiles/kali-purple.excludes

@@ -1,3 +0,0 @@
-# Exclude big packages that are Recommended by defensive tools metapackages.
-# Keep this list in sync with kali-meta/debian/control.
-exploitdb-papers

simple-cdd/profiles/kali-purple.preseed

@@ -1,4 +0,0 @@
-# Do use a network mirror, but do not upgrade, so that
-# only missing packages are fetched.
-d-i apt-setup/use_mirror boolean true
-d-i pkgsel/upgrade select none