These formulae provided software tailored to scientific endeavours.
This tap was deprecated because it had different goals from the wider Homebrew organisation (e.g. Linuxbrew CI/support). All widely used, buildable formulae were migrated to homebrew/core.
If you wish to migrate other widely used formulae to Homebrew/homebrew-core please submit a pull request there.
You may be interested in the brewsci/bio and brewsci/science taps.