[Misc] Remove all version checks for no-longer supported XWiki versions

12/mysql-tomcat/Dockerfile

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

12/postgres-tomcat/Dockerfile

12/postgres-tomcat/xwiki/hibernate.cfg.xml

13/mysql-tomcat/Dockerfile

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

13/postgres-tomcat/Dockerfile

13/postgres-tomcat/xwiki/hibernate.cfg.xml