If you are not selling digital products, you are probably using the weight and dimensions for your products because you need to ship them. At least the weight will be required for all the shipping services.
The “problem” is that when you add those data in the product, they appear in the single product page. How can you hide them?
By default WooCommerce Bookings sends the cancelled booking notification email only to the customer who purchased the booking.
In some cases could be useful to send this notification to the admin too so he is aware of this change, expecially if the site does not get so much purchases and you do not usually check the admin every day.