Use vars for URLs in README

README.md

@@ -1,9 +1,8 @@
 # ZAJE
 
+[![Go Report Card][go-report-card]][go-report-card]
+[![GoDoc][go-docs]][go-docs]
 [![License][badge-license]][license]
-[![Go Report Card](https://goreportcard.com/badge/github.com/jessp01/zaje)](https://goreportcard.com/report/github.com/jessp01/zaje)
-[![GoDoc](https://godoc.org/github.com/jessp01/zaje?status.svg)](http://godoc.org/github.com/jessp01/zaje)
-[![AGPLv3](https://img.shields.io/badge/AGPLv3-blue.svg)](https://github.com/jessp01/zaje/blob/master/LICENSE)
 
 `zaje` is a syntax highlighter that aims to cover all your shell colouring needs. It can act as an ad-hoc replacement for `cat` and, with a spot of one-line shell functions `tail` and other friends.
 
@@ -170,3 +169,5 @@ COPYRIGHT:
 
 [license]: ./LICENSE
 [badge-license]: https://img.shields.io/github/license/jessp01/zaje.svg?maxAge=604800
+[go-docs]: https://godoc.org/github.com/jessp01/zaje?status.svg
+[go-report-card]: https://goreportcard.com/badge/github.com/jessp01/zaje