Remove Build Webapps in Go Download links

[Oxyrus]

The book is no longer available to download: https://github.com/dariubs/GoBooks#build-webapps-in-go-the-anti-textbook-free

• https://www.gitbook.com/download/pdf/book/thewhitetulip/webapp-with-golang-anti-textbook
• https://www.gitbook.com/download/epub/book/thewhitetulip/webapp-with-golang-anti-textbook
• https://www.gitbook.com/download/mobi/book/thewhitetulip/webapp-with-golang-anti-textbook

404 Not Found E-Books downloads have been disabled for this book

[nathany]

Thanks for the report. It looks like it has moved from GitBook to Leanpub: https://leanpub.com/antitextbookGo/