Goodbye AppVeyor

* Made redundant by the GH actions workflow (#14), covering Windows checks on several R versions.

.Rbuildignore

@@ -6,7 +6,6 @@
 ^README\.Rmd$
 ^README-.*\.png$
 ^codecov\.yml$
-^appveyor\.yml$
 ^cran-comments\.md$
 LICENSE
 ^\.github$

README.Rmd

@@ -40,7 +40,6 @@ stop_if_no_vignette <- function(topic, package = "rTRNG") {
 
 [![CRAN status](http://www.r-pkg.org/badges/version/rTRNG)](https://cran.r-project.org/package=rTRNG)
 [![R-CMD-check](https://github.com/miraisolutions/rTRNG/workflows/R-CMD-check/badge.svg)](https://github.com/miraisolutions/rTRNG/actions?query=workflow%3AR-CMD-check)
-[![AppVeyor build status](https://ci.appveyor.com/api/projects/status/github/miraisolutions/rTRNG?branch=master&svg=true)](https://ci.appveyor.com/project/riccardoporreca/rtrng)
 [![Codecov status](https://img.shields.io/codecov/c/github/miraisolutions/rTRNG/master.svg)](https://codecov.io/github/miraisolutions/rTRNG?branch=master)
 
 **[TRNG](https://numbercrunch.de/trng/)** (Tina's Random Number Generator) is a

README.md

@@ -8,8 +8,6 @@
 [![CRAN
 status](http://www.r-pkg.org/badges/version/rTRNG)](https://cran.r-project.org/package=rTRNG)
 [![R-CMD-check](https://github.com/miraisolutions/rTRNG/workflows/R-CMD-check/badge.svg)](https://github.com/miraisolutions/rTRNG/actions?query=workflow%3AR-CMD-check)
-[![AppVeyor build
-status](https://ci.appveyor.com/api/projects/status/github/miraisolutions/rTRNG?branch=master&svg=true)](https://ci.appveyor.com/project/riccardoporreca/rtrng)
 [![Codecov
 status](https://img.shields.io/codecov/c/github/miraisolutions/rTRNG/master.svg)](https://codecov.io/github/miraisolutions/rTRNG?branch=master)