Hi!
You probably have it yet referred in the eSpace, although you are not using it.
Go to dependencies, and you will probably see something like this , the extension that rises the error highlighted in rose with a trash icon.

Well, press the trash icon , apply the changes and publish.
Hope this help
Stay safe
Graça
PS. If you have errors and cannot publish , this way you can easily find those modules Shingo have mention.