Update internals.md

it's about db-sqlite, I don't see why mysql is here

docs/internals.md

@@ -6,27 +6,6 @@ All our packages have github actions by default, so you can test your [contribut
 
 > Note: We recommend pull requesting in draft mode until all tests pass.
 
-## Docker image
-
-For greater ease it is recommended to use docker containers, for this you can use the [docker-compose.yml](https://docs.docker.com/compose/compose-file/) file that is in the docs folder.
-
-1. [MySQL 8](../../../docker-compose.yml)
-2. [MariaDB 10.11](../../../docker-compose-mariadb.yml)
-
-For running the docker containers you can use the following command:
-
-MySQL 8.0.
-
-```dockerfile
-docker compose up -d
-```
-
-MariaDB 10.11.
-
-```dockerfile
-docker compose -f docker-compose-mariadb.yml up -d
-```
-
 ## Unit testing
 
 The package is tested with [PHPUnit](https://phpunit.de/).