Remove numba dependency (#715)

**EDIT:** This now removes the numba dependency, which comes transitively from cuDF.

**Original description:**

numba-cuda is the NVIDIA-maintained CUDA target for Numba, which depends on the numba package.

This PR replaces the numba dependency with numba-cuda. However, similar to @bdice's comment in #648, I don't know if we strictly need this here any more due to the cudf dependency (from rapidsai/cudf#16474) ensuring numba-cuda is present.

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

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

URL: #715

conda/recipes/rapids/meta.yaml

@@ -31,7 +31,6 @@ requirements:
     - {{ pin_compatible('cuda-version', max_pin='x', min_pin='x') }}
     - cupy {{ cupy_version }}
     - nccl {{ nccl_version }}
-    - numba {{ numba_version }}
     - numpy {{ numpy_version }}
     - nvtx {{ nvtx_version }}
     - python

conda/recipes/versions.yaml

@@ -8,8 +8,6 @@ cupy_version:
   - '>=12.0.0'
 nccl_version:
   - '>=2.19,<3.0a0'
-numba_version:
-  - '>=0.57'
 numpy_version:
   - '>=1.23,<3.0a0'
 nvtx_version: