cfdg: remove src-for-default.nix, cleanups (#192727)

pkgs/tools/graphics/cfdg/default.nix

···
     sha256 = "13m8npccacmgxbs4il45zw53dskjh53ngv2nxahwqw8shjrws4mh";
   };
 
-  buildInputs = [ libpng bison flex ffmpeg icu ];
+  nativeBuildInputs = [ bison flex ];
+  buildInputs = [ libpng ffmpeg icu ];
 
   postPatch = ''
     sed -e "/YY_NO_UNISTD/a#include <stdio.h>" -i src-common/cfdg.l
···
   '';
 
   installPhase = ''
+    runHook preInstall
+
     mkdir -p $out/bin
     cp cfdg $out/bin/
 
     mkdir -p $out/share/doc/${pname}-${version}
     cp *.txt $out/share/doc/${pname}-${version}
+
+    runHook postInstall
   '';
 
   meta = with lib; {
···
     maintainers = with maintainers; [ raskin ];
     platforms = platforms.linux;
     homepage = "https://contextfreeart.org/";
-    license = licenses.gpl2;
+    license = licenses.gpl2Only;
   };
 }

pkgs/tools/graphics/cfdg/src-for-default.nix

···
-{
-   version="3.0.2";
-   name="cfdg-3.0.2";
-   hash="1pd1hjippbhad8l4s4lsglykh22i24qfrgmnxrsx71bvcqbr356p";
-   url="http://www.contextfreeart.org/download/ContextFreeSource3.0.2.tgz";
-   advertisedUrl="http://www.contextfreeart.org/download/ContextFreeSource3.0.2.tgz";
-
-
-}