Remove PHP Password Manager and RatticDB

Both project sites are down and neither has a commit in over 6 months.

README.md

@@ -846,8 +846,6 @@ See https://github.com/n1trux/awesome-sysadmin#monitoring and https://github.com
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  * [keeweb](https://keeweb.info/) - This webapp is a browser and desktop password manager compatible with KeePass databases. ([Source Code](https://github.com/keeweb/keeweb)) `MIT` `HTML5`
- * [PHP Password Manager](http://www.ppma.pw) - A web based, encrypting password manager, based on the Yii framework. ([Source Code](https://github.com/pklink/ppma)) `BSD` `PHP`
- * [RatticDB](http://rattic.org/) - Password Management for Humans. ([Demo](https://demo.rattic.org/cred/list/), [Source Code](https://github.com/tildaslash/RatticWeb)) `GPLv2` `Python`
  * [sysPass](http://www.syspass.org/) - Multiuser password management system. ([Demo](http://demo.syspass.org/), [Source Code](https://github.com/nuxsmin/sysPass)) `GPLv3` `PHP`
  * [Teampass](http://teampass.net/) - Password manager dedicated for managing passwords in a collaborative way on any server Apache, MySQL and PHP. ([Source Code](https://github.com/nilsteampassnet/TeamPass/)) `GPLv3` `PHP`