[Maint] drop pydantic pin

[psobolewskiPhD]

Closes napari/npe2#343
In napari/npe2#321 the pydantic < 2 pin was dropped from npe2 but it was missed here, so the conda-forge package still requires pydantic 1.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[psobolewskiPhD]

@conda-forge-admin, please rerender

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[psobolewskiPhD]

We need to fix this for the future, but for now I think we want to patch https://github.com/conda-forge/conda-forge-repodata-patches-feedstock
to lift the pin for 0.7.3 & 0.7.4
So then in principle don't need this PR at the moment?
CC: @jaimergp any advice?

Edit: I went for it: conda-forge/conda-forge-repodata-patches-feedstock#678

[hmaarrfk]

Indeed it seems to have been dropped.

Thanks: https://github.com/napari/npe2/blob/v0.7.4/pyproject.toml#L38