remove unnecessary 'setuptools' host dependency, simplify dependencie…

…s.yaml (#15736)

Pulls out some changes I noticed while working on #15245.

* removes `host` dependency on `setuptools` for `cudf` and `cudf_kafka`
  - *they don't need it now that they build with `scikit-build-core`*
* consolidates some redundant blocks in `dependencies.yaml`

Authors:
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Vyas Ramasubramani (https://github.com/vyasr)

URL: #15736

conda/recipes/cudf/meta.yaml

@@ -62,7 +62,6 @@ requirements:
     - python
     - cython >=3.0.3
     - scikit-build-core >=0.7.0
-    - setuptools
     - dlpack >=0.8,<1.0
     - numpy 1.23
     - pyarrow ==16.0.0.*

conda/recipes/cudf_kafka/meta.yaml

@@ -61,7 +61,6 @@ requirements:
     - cudf ={{ version }}
     - libcudf_kafka ={{ version }}
     - scikit-build-core >=0.7.0
-    - setuptools
     {% if cuda_major != "11" %}
     - cuda-cudart-dev
     {% endif %}

dependencies.yaml

@@ -325,9 +325,6 @@ dependencies:
           - matrix: {cuda: "11.*"}
             packages: &build_python_packages_cu11
               - &rmm_cu11 rmm-cu11==24.6.*
-          - {matrix: null, packages: null }
-      - output_types: pyproject
-        matrices:
           - {matrix: null, packages: [*rmm_conda] }
   libarrow_build:
     common:
@@ -578,10 +575,7 @@ dependencies:
               - rmm-cu11==24.6.*
               - cubinlinker-cu11
               - ptxcompiler-cu11
-          - {matrix: null, packages: null}
-      - output_types: pyproject
-        matrices:
-          - {matrix: null, packages: [cubinlinker, ptxcompiler, *rmm_conda] }
+          - {matrix: null, packages: [cubinlinker, ptxcompiler, *rmm_conda]}
   run_cudf_polars:
     common:
       - output_types: [conda, requirements, pyproject]