pkgs/data/fonts: merge back the split otb output

Since the Pango issue 457[1] has been fixed and Nixpkgs patched, it's no
longer necessary to keep X11 and .otb fonts in separate outputs (previously
they would cause application to display broken fonts).

[1]: https://gitlab.gnome.org/GNOME/pango/-/issues/457

pkgs/data/fonts/profont/default.nix

@@ -28,15 +28,10 @@ stdenv.mkDerivation {
       gzip -n -9 -c "$f" > "$out/share/fonts/misc/$f.gz"
     done
     install -D -m 644 LICENSE -t "$out/share/doc/$pname"
+    install -D -m 644 "$srcOtb/profontn.otb" -t $out/share/fonts/misc
     mkfontdir "$out/share/fonts/misc"
-
-    cd $srcOtb
-    install -D -m 644 profontn.otb -t $otb/share/fonts/misc
-    mkfontdir "$otb/share/fonts/misc"
   '';
 
-  outputs = [ "out" "otb" ];
-
   meta = with stdenv.lib; {
     homepage = "https://tobiasjung.name/profont/";
     description = "A monospaced font created to be a most readable font for programming";