Remove unused scripts

Summary: These are unused duplicates of what is in `build_and_verify_conda_package.sh` and the conda steps of nightly / deployment workflows.

Reviewed By: Balandat

Differential Revision: D56853558

fbshipit-source-id: 85a9ec621ae01a0880e50dc0773f59d0ce4d3523

Author: saitcakmak