Deleting facebook page is required when you no longer need it. To delete a facebook page from your account follow the steps mentioned here.
Login to your facebook account
Click on pages from links available on the left side of facebook
Click on facebook page you want to delete
Click on “Settings on top-right hand side of the page
Scroll down and find “Remove Page” option (should be at the end)
Click on “Delete your Page” link and you are done.
The page will not be deleted instantly as it has a procedure. Facebook will tell you about number of days needed to remove facebook page permanently.