remove code for Debian Jessie and "Kali Linux"

Jessie reached EOL quite some time ago, and we do not support
Debian/Ubuntu derrivatives, so removing code for Kali Linux.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

install.sh

@@ -258,7 +258,7 @@ check_forked() {
 					9)
 						dist_version="stretch"
 					;;
-					8|'Kali Linux 2')
+					8)
 						dist_version="jessie"
 					;;
 				esac
@@ -392,13 +392,6 @@ do_install() {
 	case "$lsb_dist" in
 		ubuntu|debian|raspbian)
 			pre_reqs="apt-transport-https ca-certificates curl"
-			if [ "$lsb_dist" = "debian" ]; then
-				# libseccomp2 does not exist for debian jessie main repos for aarch64
-				if [ "$(uname -m)" = "aarch64" ] && [ "$dist_version" = "jessie" ]; then
-					add_debian_backport_repo "$dist_version"
-				fi
-			fi
-
 			if ! command -v gpg > /dev/null; then
 				pre_reqs="$pre_reqs gnupg"
 			fi