Remove link to blog posts

README.md

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 rqlite [![Circle CI](https://circleci.com/gh/rqlite/rqlite/tree/master.svg?style=svg)](https://circleci.com/gh/rqlite/rqlite/tree/master) [![GoDoc](https://godoc.org/github.com/rqlite/rqlite?status.svg)](https://godoc.org/github.com/rqlite/rqlite) [![Release](https://img.shields.io/github/release/rqlite/rqlite.svg)](https://github.com/rqlite/rqlite/releases)
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-*Detailed background on rqlite can be found on [these blog posts](http://www.philipotoole.com/tag/rqlite/)*.
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 *rqlite* is a distributed relational database, which uses [SQLite](https://www.sqlite.org/) as its storage engine. rqlite is written in [Go](http://golang.org/) and uses [Raft](http://raftconsensus.github.io/) to achieve consensus across all the instances of the SQLite databases. rqlite ensures that every change made to the database is made to a quorum of SQLite files, or none at all.
 
 ### Why?