remove old unworking folders

moodle/docker-compose.yml

rights-engine/.env.sample

rights-engine/.gitkeep

rights-engine/docker-compose.local.yml

rights-engine/docker-compose.yml

rights-engine/docker-compose.yml.local

single-compose-with-moodle/.env.sample

single-compose-with-moodle/configuration/moodle_engines.yml

...-compose-with-moodle/configuration/moodle_engines.yml.bak

single-compose-with-moodle/docker-compose.yml

single-compose/configuration/h5p_engines.yml

single-compose/lrs_statements_dump.json