Remove low-install-count CT scripts and installers (#13570)

install/apache-cassandra-install.sh

@@ -1,31 +0,0 @@
-#!/usr/bin/env bash
-
-# Copyright (c) 2021-2026 tteck
-# Author: tteck (tteckster)
-# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
-# Source: https://cassandra.apache.org/_/index.html
-
-source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
-color
-verb_ip6
-catch_errors
-setting_up_container
-network_check
-update_os
-
-JAVA_VERSION="11" setup_java
-
-msg_info "Installing Apache Cassandra"
-setup_deb822_repo \
-  "cassandra" \
-  "https://downloads.apache.org/cassandra/KEYS" \
-  "https://debian.cassandra.apache.org" \
-  "41x" \
-  "main"
-$STD apt install -y cassandra cassandra-tools
-sed -i -e 's/^rpc_address: localhost/#rpc_address: localhost/g' -e 's/^# rpc_interface: eth1/rpc_interface: eth0/g' /etc/cassandra/cassandra.yaml
-msg_ok "Installed Apache Cassandra"
-
-motd_ssh
-customize
-cleanup_lxc