readme: remove appveyor build badge
diff --git a/README.md b/README.md
index e9461d6..02819fb 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,6 @@ libgit2 - the Git linkable library
==================================
[](http://travis-ci.org/libgit2/libgit2)
-[](https://ci.appveyor.com/project/libgit2/libgit2/branch/master)
[](https://libgit2.visualstudio.com/libgit2/_build/latest?definitionId=7)
[](https://scan.coverity.com/projects/639)