Remove reference to single page output

Author: SamyPesse

README.md

@@ -133,7 +133,6 @@ GitBook can generate your book in the following formats:
 
 * **Static Website**: This is the default format. It generates a complete interactive static website that can be, for example, hosted on GitHub Pages.
 * **eBook**: A complete eBook with exercise solutions at the end of the book. Generate this format using: ```gitbook ebook ./myrepo```. You need to have [ebook-convert](http://manual.calibre-ebook.com/cli/ebook-convert.html) installed. The output format could be **PDF**, **ePub** or **MOBI**.
-* **Single Page**: The book will be stored in a single printable HTML page. This format is used for conversion to PDF or eBook. Generate this format using: ```gitbook build ./myrepo -f page```.
 * **JSON**: This format is used for debugging or extracting metadata from a book. Generate this format using: ```gitbook build ./myrepo -f json```.
 
 ## Book Format