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/clearlyU/default.nix

@@ -20,19 +20,12 @@ stdenv.mkDerivation rec {
   '';
 
   installPhase = ''
-    # install bdf fonts
+    # install otb and bdf fonts
     fontDir="$out/share/fonts"
-    install -m 644 -D *.bdf -t "$fontDir"
-    mkfontdir "$fontDir"
-
-    # install otb fonts
-    fontDir="$otb/share/fonts"
-    install -m 644 -D *.otb -t "$fontDir"
+    install -m 644 -D *.bdf *.otb -t "$fontDir"
     mkfontdir "$fontDir"
   '';
 
-  outputs = [ "out"  "otb" ];
-
   meta = with stdenv.lib; {
     description = "A Unicode font";
     license = licenses.mit;