Aria here, one of the Social Care gurus at Shopify.
You can use your Language Editor to change how your language appears in themes.
To find it, go to Online Store > Themes > Actions (to the left of Customize) > Edit Languages.
You can type the text you want to edit in the filter box at the top:
If you want to delete it entirely, just use your space bar then save.
Let me know how you get on.