Remove autotools support

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
4 jobs for remove-autotools in 2 minutes and 8 seconds (queued for 6 seconds)
Status Name Job ID Coverage
  Docker Image
passed debian-buster #15158092

00:00:11

 
  Build And Test
passed meson #15158093

00:01:56

passed meson-noglamor #15158094

00:01:23

passed mingw-cross-build #15158095

00:00:42