0.9.0 Remove `current` argument from `aws_region`

what

• Remove current argument from aws_region

why

• Fixes data.aws_region.default: "current": [REMOVED] Defaults to current provider region if no other filtering is enabled in aws provider versions 2.x.x

references

*https://www.terraform.io/docs/providers/aws/guides/version-2-upgrade.html#data-source-aws_region