haskellPackages.gi-gtk: Re-enable parallel building

The GHC bug isn't fixed, but there has been a workaround added to
haskell-gi 0.26.10 to avoid triggering the problem.

1. https://gitlab.haskell.org/ghc/ghc/-/issues/23392
2. https://hackage.haskell.org/package/haskell-gi-0.26.10/changelog

pkgs/development/haskell-modules/configuration-ghc-9.10.x.nix

@@ -54,9 +54,6 @@ self: super: {
   unix = null;
   xhtml = null;
 
-  # https://gitlab.haskell.org/ghc/ghc/-/issues/23392
-  gi-gtk = disableParallelBuilding super.gi-gtk;
-
   #
   # Version upgrades
   #

pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix

@@ -52,6 +52,4 @@ self: super: {
   unix = null;
   xhtml = null;
 
-  # https://gitlab.haskell.org/ghc/ghc/-/issues/23392
-  gi-gtk = disableParallelBuilding super.gi-gtk;
 }

pkgs/development/haskell-modules/configuration-ghc-9.6.x.nix

@@ -107,9 +107,6 @@ self: super: {
     package-version             # doctest <0.21, tasty-hedgehog <1.4
   ;
 
-  # Avoid triggering an issue in ghc-9.6.2
-  gi-gtk = disableParallelBuilding super.gi-gtk;
-
   # Pending text-2.0 support https://github.com/gtk2hs/gtk2hs/issues/327
   gtk = doJailbreak super.gtk;
 

pkgs/development/haskell-modules/configuration-ghc-9.8.x.nix

@@ -145,7 +145,4 @@ self: super: {
     sha256 = "sha256-umjwgdSKebJdRrXjwHhsi8HBqotx1vFibY9ttLkyT/0=";
   }) super.reflex;
 
-  # https://gitlab.haskell.org/ghc/ghc/-/issues/23392
-  gi-gtk = disableParallelBuilding super.gi-gtk;
-
 }