Revert "opensubdiv: Remove cudatoolkit from the closure"

This reverts commit 6a472cf4c1. On
second thought, this is not a good idea, because it means that a
CUDA-enabled Blender doesn't work on non-CUDA systems anymore (since
they don't have libOpenCL.so in /run/opengl-driver). I guess a better
solution will be to split cudatoolkit into multiple outputs.

pkgs/development/libraries/opensubdiv/default.nix

@@ -39,16 +39,7 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
-  postInstall =
+  postInstall = "rm $out/lib/*.a";
-    ''
-      rm $out/lib/*.a
-    '' + lib.optionalString cudaSupport ''
-      # Drop cudatoolkit reference from the closure. We'll get
-      # libOpenCL from /run/opengl-driver.
-      s=${cudatoolkit}/lib
-      t=$(for ((i = 0; i < ''${#s}; i++)); do echo -n X; done)
-      sed -i $out/lib/libosdGPU.so.* -e "s|$s|$t|g"
-    '';
 
   meta = {
     description = "An Open-Source subdivision surface library";