Delete a table
To delete a table:
1. Select the table you wish to delete from your sheet.
2. Go to the side pane and click 
3. Click Remove Table.
4. Select either Remove Table and Keep Formats or Remove Table and Formats.
Choosing Remove Table and Keep Formats will convert the table style to standard cell range, and the associated defined name will get deleted. However, the appearance of the range will still be in a table style and the cell formats applied to it will remain intact. Whereas, choosing Remove Table and Formats will convert the table style to standard cell range and the entire table along with formats will get deleted.