Deleting Repeated Lines of Data

I get data imported into an excel spreadsheet. Its not very conducive because I have around 450 pages of data that all have the same header at the top of the page with information I want removed. Is there any code that will help me remove all the repeated lines that I don't need? See attached spreadsheet, the highlighted items are what I would need to be removed. Basically I'm wanting to delete 8 rows, keep the next 48, delete the next 8, keep the next 48, and repeat.
Thanks in advance for any advice or help you can give me.