classy-prelude-yesod: fix build by skipping haddock

pkgs/development/haskell-modules/configuration-common.nix

···
   feldspar-signal = dontHaddock super.feldspar-signal; # https://github.com/markus-git/feldspar-signal/issues/1
   hoodle-core = dontHaddock super.hoodle-core;
   hsc3-db = dontHaddock super.hsc3-db;
+  classy-prelude-yesod = dontHaddock super.classy-prelude-yesod; # https://github.com/haskell/haddock/issues/979
 
   # https://github.com/techtangents/ablist/issues/1
   ABList = dontCheck super.ABList;

pkgs/development/haskell-modules/configuration-hackage2nix.yaml

···
   - ClassLaws
   - classy-miso
   - classy-parallel
-  - classy-prelude-yesod
   - ClassyPrelude
   - clay
   - clckwrks

pkgs/development/haskell-modules/hackage-packages.nix

···
        description = "Provide a classy prelude including common Yesod functionality";
        license = stdenv.lib.licenses.mit;
        hydraPlatforms = stdenv.lib.platforms.none;
-       broken = true;
      }) {};
 
   "classyplate" = callPackage