I just found this out while playing around in ZenCart. If you have a ZenCart installation and you’re wondering how to remove that “Show Quantity in Stock” message from your product pages, there’s actually a setting in your admin panel to turn it off. Simply log into your admin panel and go to Admin > Catalog > Product types > Product general > Show Quantity in Stock. Set the value to “0” and that’s it!
Note: Apparently some themes have issues with this function — even after setting this value to “0”, you’ll still find that the product page displaying that message. The only option now is to remove that line from your template.