$docdev fixups: mostly to avoid empty output

... after auto-removing some kinds of files by default.
In some cases I let them be removed and in others I let them be put into
$docdev. That was more due to general indecisiveness on this question
than any reasons in the particular cases.

pkgs/development/libraries/atk/default.nix

@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  outputs = [ "dev" "out" "doc" ];
+  outputs = [ "dev" "out" ];
 
   buildInputs = libintlOrEmpty;