Remove duplicate info found in README.md and point to README.md

contracts/eosiolib/mainpage.md

@@ -4,20 +4,7 @@ Welcome to the EOS.IO Documentation
 @note This documentation is in progress and subject to change due to rapid development. Please report inaccuracies identified to the [EOS.IO Developer Telegram Group](https://t.me/joinchat/EaEnSUPktgfoI-XPfMYtcQ)
 
 ## EOS.IO
- - [EOS.IO Official Website](https://www.eos.io/)
- - [Github](https://github.com/eosio)
- - [Blog](https://steemit.com/@eosio)
- - [Roadmap](https://github.com/EOSIO/Documentation/blob/master/Roadmap.md/)
- - [Telegram](https://www.eos.io/chat/)
- - [White Paper](https://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md/)
- - [Wiki](https://github.com/EOSIO/eos/wiki/)
-
-## Environment Setup
-- [Automatic Build Scripts](https://github.com/EOSIO/eos#automated-build-script)
-- [Manual Installation of Dependencies](https://github.com/EOSIO/eos#manualdep)
-	- [Clean Install Ubuntu 16.10](https://github.com/EOSIO/eos#ubuntu)
-	- [Clean Install macOS Sierra 10.12.6](https://github.com/EOSIO/eos#macos)
-- [Docker](https://github.com/EOSIO/eos/tree/master/Docker)
+ - [Additional resources - Github Readme](https://github.com/EOSIO/eos#readme)
 
 ## Smart Contract Developers
 - @ref eosiorpc