Adminimal Administration Menu provides the SlickNav Responsive Mobile Menu library, which is MIT licenced.
Drupal.org permits the MIT license, because it is GPL-compatible:
It is possible to distribute a module that integrates with a 3rd party PHP or JavaScript library, as long as the library is under either a GPL or GPL-compatible license. Examples of compatible licenses include BSD/MIT-style "permissive" licenses or the Lesser General Public License (LGPL). The Free Software Foundation maintains a list of popular GPL-compatible licenses.
... but the license on GitHub requires that the license is copied with every copy of SlickNav:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
So Adminimal Administration Menu is in violation of the MIT license.
Drupal also discourages the inclusion of external libraries into Drupal projects:
If you wish to contribute a bridge module to a Drupal Git repository, please do not check in the 3rd party library itself. Doing so creates a fork of that 3rd party library, which makes it more difficult to maintain and only serves to waste disk space. Instead, provide detailed instructions for users to download and install that 3rd party library for use with your module.
This all can be fixed by including the MIT license, or by removing the library from the module (which is recommended).
Needs work
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.