haskell.packages.ghc96.warp: remove override to 3.3.28

Versions of warp >=3.3.26 have the crypton-x509 dependency (forked
from x509), which pulls in cascading breakage.

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

@@ -252,9 +252,6 @@ self: super: {
     })];
   }) super.ConfigFile;
 
-  # Use newer version of warp with has the openFd signature change for
-  # compatibility with unix>=2.8.0.
-  warp = self.warp_3_3_28;
   # The curl executable is required for withApplication tests.
   warp_3_3_28 = addTestToolDepend pkgs.curl super.warp_3_3_28;
 }