By default we enable both a delivery date and time slot picker on your store. Should you wish to disable either of these please follow the instructions below.
Login to Store Pickup + Delivery from your Shopify Apps page
Click on the Local Delivery option:
Scroll down to the Date picker block and locate the block titled Date and time slot picker:
To disable the delivery time slot picker uncheck Enable delivery time slot picker
To disable the delivery date picker uncheck Enable delivery date picker