Remove badges from README.md

Removed badges that no longer work from README.

Author: davecom

README.md

@@ -7,9 +7,6 @@
 [![CocoaPods Platforms](https://img.shields.io/cocoapods/p/SwiftGraph.svg)](https://cocoapods.org/pods/SwiftGraph)
 [![Linux Compatible](https://img.shields.io/badge/Linux-compatible-4BC51D.svg?style=flat)](https://swift.org)
 [![Twitter Contact](https://img.shields.io/badge/[email protected]?style=flat)](https://twitter.com/davekopec)
-[![Build Status](https://travis-ci.org/davecom/SwiftGraph.svg?branch=master)](https://travis-ci.org/davecom/SwiftGraph)
-[![Maintainability](https://api.codeclimate.com/v1/badges/b93b35351ff96b21678f/maintainability)](https://codeclimate.com/github/davecom/SwiftGraph/maintainability)
-[![Test Coverage](https://api.codeclimate.com/v1/badges/b93b35351ff96b21678f/test_coverage)](https://codeclimate.com/github/davecom/SwiftGraph/test_coverage)
 
 SwiftGraph is a pure Swift (no Cocoa) implementation of a graph data structure, appropriate for use on all platforms Swift supports (iOS, macOS, Linux, etc.). It includes support for weighted, unweighted, directed, and undirected graphs. It uses generics to abstract away both the type of the vertices, and the type of the weights.