fix?(docs): don't download artifacts for building docs

Author: gforsyth

ci/build_docs.sh

@@ -4,10 +4,6 @@
 
 set -euo pipefail
 
-rapids-logger "Downloading artifacts from previous jobs"
-CPP_CHANNEL=$(rapids-download-from-github "$(rapids-artifact-name conda_cpp libcuvs cuvs --cuda "$RAPIDS_CUDA_VERSION")")
-PYTHON_CHANNEL=$(rapids-download-from-github "$(rapids-artifact-name conda_python cuvs cuvs --stable --cuda "$RAPIDS_CUDA_VERSION")")
-
 rapids-logger "Create docs conda environment"
 . /opt/conda/etc/profile.d/conda.sh
 
@@ -17,8 +13,6 @@ conda config --set channel_priority strict
 rapids-dependency-file-generator \
   --output conda \
   --file-key docs \
-  --prepend-channel "${CPP_CHANNEL}" \
-  --prepend-channel "${PYTHON_CHANNEL}" \
   --matrix "cuda=${RAPIDS_CUDA_VERSION%.*};arch=$(arch);py=${RAPIDS_PY_VERSION}" \
   | tee env.yaml