Checklist

• I added a descriptive title
• I searched open requests and couldn't find a duplicate

What is the idea?

Originally added in #578 (see writeup in #575) this templating engine would appear to be a precursor to the conda_build_config.yaml used today.

This templating engine is an odd artifact at this point and actually wont work anymore unless there happens to be a directory in the user's CWD that matches the currently active environment.

Per searches here on GitHub conda-forge, bioconda, nor Anaconda uses this templating engine anymore.

Uncovered while investigating #5493

Why is this needed?

Less legacy code to wrangle.

What should happen?

Review and remove clearly outdated code from the Jinja templating engine.

Additional Context

No response