faust2sc: remove workaround

Before faust 2.59.6 faust2sc had a bug, now headers can be provided from the path of the source package.

pkgs/applications/audio/faust/faust2sc.nix

@@ -22,17 +22,11 @@ stdenv.mkDerivation (faustDefaults // {
   '';
 
   postFixup = ''
-    # export parts of the build environment
-    mkdir "$out"/include
-    # until pr #887 is merged and released in faust we need to link the header folders
-    ln -s "${supercollider}"/include/SuperCollider/plugin_interface "$out"/include/plugin_interface
-    ln -s "${supercollider}"/include/SuperCollider/common "$out"/include/common
-    ln -s "${supercollider}"/include/SuperCollider/server "$out"/include/server
     wrapProgram "$out"/bin/${baseName} \
       --append-flags "--import-dir ${faust}/share/faust" \
       --append-flags "--architecture-dir ${faust}/share/faust" \
       --append-flags "--architecture-dir ${faust}/include" \
-      --append-flags "-p $out" \
+      --append-flags "-p ${supercollider}" \
       --prefix PATH : "$PATH"
   '';
 })