The Code is an optional unique product identifier:
If the Code is not something that your business/company uses, it can be hidden by navigating to Settings > Pricing Table and disabling the toggle for Manufacturer / Code:
Should the Code be something that your business/company would require on a Template-by-Template basis, it can be updated at the Template level by navigating to the Settings for the required Template(s) and selecting Customize Pricing Table display for this Template under Pricing Table to adjust the display accordingly: