Revert "gtk3: fix build on darwin"

The ld64 issue has been fixed.

This reverts commit 7487e9cc51.

pkgs/by-name/gt/gtk3/package.nix

@@ -58,8 +58,6 @@
   broadwaySupport ? true,
   wayland-scanner,
   testers,
-  # TODO: Clean up on `staging`
-  llvmPackages,
 }:
 
 let
@@ -144,10 +142,6 @@ stdenv.mkDerivation (finalAttrs: {
       ]
   ++ lib.optionals waylandSupport [
     wayland-scanner
-  ]
-  # TODO: Clean up on `staging`
-  ++ lib.optionals stdenv.hostPlatform.isDarwin [
-    llvmPackages.lld
   ];
 
   buildInputs =
@@ -219,17 +213,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # These are the defines that'd you'd get with --enable-debug=minimum (default).
   # See: https://developer.gnome.org/gtk3/stable/gtk-building.html#extra-configuration-options
-  env = {
-    NIX_CFLAGS_COMPILE = "-DG_ENABLE_DEBUG -DG_DISABLE_CAST_CHECKS";
-  }
-  // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
-    # workaround for ld64 hardening issue
-    #
-    # TODO: Clean up on `staging`
-
-    CC_LD = "lld";
-    OBJC_LD = "lld";
-  };
+  env.NIX_CFLAGS_COMPILE = "-DG_ENABLE_DEBUG -DG_DISABLE_CAST_CHECKS";
 
   postPatch = ''
     # See https://github.com/NixOS/nixpkgs/issues/132259