Thank you for reaching out on this.
The Signature requirement might have been entered as "Messages" on your quotes. To change customer-facing messages, please check out the instructions included in this article:
How to set up or change customer messages
Please let us know if you require additional assistance on this. Thank you.
As of the moment, there isn't an option to delete the signature requirement section of your quote. This is because it is included in the default template and the margin depends on the number of line items you've included in your quote.
In case you need some reference, here's an article you can read to learn more about how you can customise your template: Customise your Invoices, Quotes and Sales Receipts.
As always, you can visit our Manage Customers and Income articles in case you need some tips and related references for your future tasks.
If there's anything else that I can help you with, please let me know in the comment section down below. I'll be always around ready to help.