If you are using the latest version of ShowTime you can edit this via the language settings.
This and a lot of other text on the site can be modified in the Theme Languages section. To access this, please follow these steps:
- From your Shopify dashboard, click Online Store > Themes and look for ShowTime.
- Click the "Actions" button and choose Edit Language from the drop-down menu
- Layout > Footer > Theme credits HTML> Remove the text
- Click the "Save" button to save your changes.