Drop extraneous dependencies from cudf conda recipe. (#13406)

This PR drops two dependencies from the cudf conda recipe.

- `numba` is only a `run` dependency and should not be listed in `host`.
- `fastavro` is only a test dependency. It is listed in `dependencies.yaml` but does not need to be listed in `meta.yaml` as a run dependency. This is already listed as a testing dependency in `pyproject.toml`.

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - GALI PREM SAGAR (https://github.com/galipremsagar)
  - Ray Douglass (https://github.com/raydouglass)

URL: #13406

conda/recipes/cudf/meta.yaml

@@ -53,7 +53,6 @@ requirements:
     - cython >=0.29,<0.30
     - scikit-build >=0.13.1
     - setuptools
-    - numba >=0.56.4,<0.57
     - dlpack >=0.5,<0.6.0a0
     - pyarrow =11
     - libcudf ={{ version }}
@@ -69,7 +68,6 @@ requirements:
     - numpy >=1.21,<1.24  # Temporarily upper bound numpy to avoid overflow deprecations
     - {{ pin_compatible('pyarrow', max_pin='x.x.x') }}
     - libcudf {{ version }}
-    - fastavro >=0.22.0
     - {{ pin_compatible('rmm', max_pin='x.x') }}
     - fsspec >=0.6.0
     - {{ pin_compatible('cudatoolkit', max_pin='x', min_pin='x') }}