python3Packages.cupy: drop dependency on cudnn (#507780)

pkgs/development/python-modules/cupy/default.nix

@@ -22,8 +22,6 @@
 }:
 
 let
-  inherit (cudaPackages) cudnn;
-
   shouldUsePkg = lib.mapNullable (pkg: if pkg.meta.available or true then pkg else null);
 
   # some packages are not available on all platforms
@@ -106,7 +104,6 @@ buildPythonPackage.override { stdenv = cudaPackages.backendStdenv; } (finalAttrs
 
   buildInputs = [
     cudatoolkit-joined
-    cudnn
     libcutensor
     nccl
   ];

pkgs/top-level/python-packages.nix

@@ -3396,21 +3396,7 @@ self: super: with self; {
 
   cuda-pathfinder = callPackage ../development/python-modules/cuda-pathfinder { };
 
-  cupy = callPackage ../development/python-modules/cupy {
-    cudaPackages =
-      # CuDNN 9 is not supported:
-      # https://github.com/cupy/cupy/issues/8215
-      # NOTE: cupy 14 will drop support for cuDNN entirely.
-      # https://github.com/cupy/cupy/pull/9326
-      let
-        version = if pkgs.cudaPackages.backendStdenv.hasJetsonCudaCapability then "8.9.5" else "8.9.7";
-      in
-      pkgs.cudaPackages.override (prevArgs: {
-        manifests = prevArgs.manifests // {
-          cudnn = pkgs._cuda.manifests.cudnn.${version};
-        };
-      });
-  };
+  cupy = callPackage ../development/python-modules/cupy { };
 
   curated-tokenizers = callPackage ../development/python-modules/curated-tokenizers { };