stop uploading packages to downloads.rapids.ai (pt 2) (#6828)

Follow-up to #6803

Removes one more place where packages were getting uploaded to `downloads.rapids.ai`. Sorry 😅

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

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

URL: #6828

Author: jameslamb

ci/build_python.sh

@@ -43,5 +43,3 @@ sccache --show-adv-stats
 # remove build_cache directory to avoid uploading the entire source tree
 # tracked in https://github.com/prefix-dev/rattler-build/issues/1424
 rm -rf "$RAPIDS_CONDA_BLD_OUTPUT_DIR"/build_cache
-
-rapids-upload-conda-to-s3 python