Remove migration adding column to environments
This migration blocks droping environment migration in core.
Fixes #33561 - drop Puppet Environment migration
Foreman core wants to remove the Environments migrations and Katello useless migration is blocking it.
We can safely remove the migration and let ForemanPuppet remove the column.
ForemanPuppet is dealing with this in https://github.com/theforeman/foreman_puppet/pull/200