[Misc] Remove dead 14.4.x branch

14.4/mariadb-tomcat/.env

14.4/mariadb-tomcat/Dockerfile

14.4/mariadb-tomcat/docker-compose.yml

14.4/mariadb-tomcat/mariadb/init.sql

14.4/mariadb-tomcat/mariadb/xwiki.cnf

14.4/mariadb-tomcat/tomcat/setenv.sh

14.4/mariadb-tomcat/xwiki/docker-entrypoint.sh

14.4/mariadb-tomcat/xwiki/hibernate.cfg.xml

14.4/mysql-tomcat/.env

14.4/mysql-tomcat/Dockerfile

14.4/mysql-tomcat/docker-compose.yml

14.4/mysql-tomcat/mysql/init.sql

14.4/mysql-tomcat/mysql/xwiki.cnf

14.4/mysql-tomcat/tomcat/setenv.sh

14.4/mysql-tomcat/xwiki/docker-entrypoint.sh

14.4/mysql-tomcat/xwiki/hibernate.cfg.xml

14.4/postgres-tomcat/.env

14.4/postgres-tomcat/Dockerfile

14.4/postgres-tomcat/docker-compose.yml

14.4/postgres-tomcat/tomcat/setenv.sh