Remove unneeded jupytercad_lab dependencies

[martinRenou]

This was having the downside of not being able to install it in an emscripten-wasm32 env:

error    libmamba Could not solve for environment specs
    The following packages are incompatible
    └─ jupytercad_lab is not installable because there are no viable options
       ├─ jupytercad_lab [1.0.0|1.0.1] would require
       │  └─ y-py >=0.6,<0.7 , which does not exist (perhaps a missing channel);
       └─ jupytercad_lab [2.0.0|2.0.1|2.0.2] would require
          └─ jupyterlab >=4,<5 , which requires
             └─ tornado >=6.2.0 , which does not exist (perhaps a missing channel).

[github-actions]

Preview PR at appsharing.space

[arjxn-py]

Thanks @martinRenou, looks alright to me :)

[trungleduc]

Thanks!