GitHub no longer provides standalone downloads

Downloads can be hosted on GitHub using releases. However, prebuild binaries for such a simple library were never that useful.

README.md

@@ -16,7 +16,6 @@ All releases are based on master, so the preferred way of using xml.c is adding
 the repository as [git submodule](http://git-scm.com/book/en/Git-Tools-Submodules).
 
 If you prefer formal releases, check out the [release tags](https://github.com/ooxi/xml.c/tags).
-[Prebuild binaries](https://github.com/ooxi/xml.c/downloads) are also available.
 
 
 Building xml.c