jupyter-kernel: remove traceVal
jupyter-kernel: remove traceVal

`traceVal` is only for debugging and should not be delivered.

Partial revert of f72d7c49d58e0ab1ea948e015eeee9b4b5af4036, fixes ofBorg eval.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs