haskellPackages.gi-gtk-declarative: fix build by disabling tests

gi-gtk-declarative requires an X11 display in its test suite.
X11 display is not available inside nix build sandbox, which makes tests fail.

Solution: disable tests for gi-gtk-declarative.

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

@@ -99083,8 +99083,6 @@ self: {
        ];
        description = "Declarative GTK+ programming in Haskell";
        license = stdenv.lib.licenses.mpl20;
-       hydraPlatforms = stdenv.lib.platforms.none;
-       broken = true;
      }) {};
 
   "gi-gtk-declarative-app-simple" = callPackage
@@ -99103,8 +99101,6 @@ self: {
        ];
        description = "Declarative GTK+ programming in Haskell in the style of Pux";
        license = stdenv.lib.licenses.mpl20;
-       hydraPlatforms = stdenv.lib.platforms.none;
-       broken = true;
      }) {};
 
   "gi-gtk-hs" = callPackage