Remove old CI derivation

test/ci.nix

@@ -1,32 +0,0 @@
-{ self, super, bsc, testPkgs }:
-
-let
-  stdenv = self.stdenv;
-in
-
-stdenv.mkDerivation rec {
-  name = "ci";
-  src = ./ci.nix;
-  dontUnpack = true;
-
-  # Just build some packages
-  buildInputs = testPkgs;
-
-  buildPhase = ''
-    if [ -e /boot ]; then
-      echo Build is NOT under chroot
-      echo This is the content of / :
-      ls -l /
-      exit 1
-    fi
-
-    echo "OK: Build is under chroot"
-
-    echo "buildInputs:"
-    printf -- "- %s\n" $buildInputs
-  '';
-
-  installPhase = ''
-    touch $out
-  '';
-}