Remove Simplenews Newsletters? I had set a content type to allow it to be used as a simplenews newsletter, and then updated the JSON Feeds Processor so that it filled in the simplenews category for all the items.

However after realizing this wasn't what I needed, I removed the field simplenews from the content type and removed the option "use as newsletter" too, but all the newsletters still show up in the admin page.

I want to delete all of these old newsletters but there doesn't seem to be any option in the module to do that ?
Inorder to remove Simple newsletter completely. You need to disable and uninstall the module.

Follow the steps


Go to Modules list (admin/modules) and uncheck simplenews letter to disable and click 'Save Configuration' to disable the module
Then Go to admin/modules/uninstall page and select/check the simplenews letter module and click 'Uninstall' to remove all data related to Simplenews letter module from your instance.