Delete Pages From PDF
Use the “Delete Pages” option to remove unwanted pages from your final PDF file.
Google Drive 
Dropbox
Your browser doesn't have Flash, Silverlight or HTML5
support.
Language
Use the “Delete Pages” option to remove unwanted pages from your final PDF file.
Upload PDF file you want to delete pages
Select a page thumbnail you want to delete and click the Delete icon to delete the page
When the pages you want to delete have been deleted, you can download the new file to your device or save to your Dropbox/ Drive