To remove the requirement for copyright and license information for files before they are published, deselect the Copyright and license information must be provided for files before they are published checkbox [1].
To lock this setting for sub-accounts and courses, click the Lock this setting for sub-accounts and courses checkbox [2]. If this option is locked but not enabled, it will be disabled in all sub-accounts and courses and cannot be managed in sub-accounts or courses.
If the Copyright and license information must be provided for files before they are published option is not enabled and not locked, it will be disabled in all sub-accounts and courses by default, but can be enabled by sub-account admins or instructors, respectively.