As a follow up to ARROW-15693, support for the name "master" in the default_branch property of the Target class defined in dev/archery/archery/crossbow/core.py should be removed after the migration to "main" as the default Git branch is complete.
Making this change will also require updating the implementation of the Target.is_default_branch() method to use the keyword is instead of in for checking whether on the default branch.
Reporter: Kevin Gurney / @kevingurney
Note: This issue was originally created as ARROW-17552. Please see the migration documentation for further details.