Consider removing languages from the installer

Some related discussion from Slack: https://drupal.slack.com/archives/C072BF486FN/p1736266751121509

I'm fine with removing it, I think that is better if it results in a confusing experience.

Created an MR which removed the included JS and CSS files and hides the markup from the template. Not sure if we also want to remove the whole CSS and JS files from the repo, as there is a code which will be used in the future when multilanguage recipe will be added, but if yes, I think it can be done easily.

Go ahead and remove them; we can always get them back from the Git history.

You'll probably test at least one test failure, since the presence of the languages is exposed to drupalSettings: https://git.drupalcode.org/project/drupal_cms/-/blob/1.x/project_templat...

Yeah, thanks! Find out that we need to remove also InstallerFormBase.php. Tests seems to be green now, so hopefully ready to review again.

Looks good to me, thanks!

Merged into 1.x and cherry-picked to 1.0.x. Thanks!