Remove outdated badges

Author: nalimilan

README.md

@@ -3,8 +3,6 @@ CategoricalArrays.jl
 
 [![Build Status](https://travis-ci.org/JuliaData/CategoricalArrays.jl.svg?branch=master)](https://travis-ci.org/JuliaData/CategoricalArrays.jl)
 [![Build Status](https://ci.appveyor.com/api/projects/status/jq64i3656pwi18pg?svg=true)](https://ci.appveyor.com/project/nalimilan/categoricalarrays-jl)
-[![Julia 0.7 Status](http://pkg.julialang.org/badges/CategoricalArrays_0.7.svg)](http://pkg.julialang.org/?pkg=CategoricalArrays&ver=0.7)
-[![Julia 1.0 Status](http://pkg.julialang.org/badges/CategoricalArrays_1.0.svg)](http://pkg.julialang.org/?pkg=CategoricalArrays&ver=1.0)
 [![Coveralls](https://coveralls.io/repos/github/JuliaData/CategoricalArrays.jl/badge.svg)](https://coveralls.io/github/JuliaData/CategoricalArrays.jl)
 [![Codecov](https://codecov.io/gh/JuliaData/CategoricalArrays.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaData/CategoricalArrays.jl)