If you're not using using the Wordpress or Shopify integrations, you can filter out microdata using our SchemaFilter which is freely available via our Microdata Filter GitHub page.
For more information, see our article Microdata Filter Questions and Answers.
If you're using our WordPress plugin, see How do I remove the microdata from my WordPress theme? If you're using our Shopify plugin, see How do I enable the microdata filter in Schema App for the Shopify Integration?