Remove inactive badges for Travis and Codecov

Author: baddstats

README.md

@@ -4,8 +4,6 @@
 
 [![CRAN status](https://www.r-pkg.org/badges/version/spatstat.sparse)](http://CRAN.R-project.org/package=spatstat.sparse)
 [![GitHub R package version](https://img.shields.io/github/r-package/v/spatstat/spatstat.sparse)](https://github.com/spatstat/spatstat.sparse)
-![R-CMD-check](https://github.com/spatstat/spatstat.sparse/workflows/R-CMD-check/badge.svg)
-[![Code Coverage Score](https://codecov.io/github/spatstat/spatstat.sparse/coverage.svg?branch=master)](https://codecov.io/github/spatstat/spatstat.sparse?branch=master)
 
 This repository contains the current _development version_ of the
 `spatstat.sparse` package.