haskell-pandoc: new versions compile with Cabal 2.x out of the box

pkgs/development/haskell-modules/configuration-ghc-8.2.x.nix

···
   # https://github.com/aristidb/aws/issues/238
   aws = doJailbreak super.aws;
 
-  # https://github.com/jgm/pandoc/issues/3876
-  pandoc = let fixSetup = pkgs.fetchpatch {
-                            url = "https://github.com/jgm/pandoc/pull/3899.patch";
-                            sha256 = "0lk9vs2l1wc1kr0y8fkdcarfi4sjd3dl81r52n39r25xx9kqawv7";
-                          };
-           in overrideCabal super.pandoc (drv: {
-                editedCabalFile = null;
-                patches = drv.patches or [] ++ [fixSetup];
-                setupHaskellDepends = drv.setupHaskellDepends or [self.Cabal_1_24_2_0];
-                preCompileBuildDriver = "setupCompileFlags+=' -package=Cabal-1.24.2.0'";
-              });
-
   # LTS-9 versions do not compile.
   path = dontCheck super.path;
   path-io = super.path-io_1_3_3;