Revert "RABBITMQ_BASE can be %APPDATA%\Roaming\RabbitMQ on Windows"
Revert "RABBITMQ_BASE can be %APPDATA%\Roaming\RabbitMQ on Windows"

This reverts commit 5c6a95182e3829efe15516c75a05aac176c7fa2d.

`%APPDATA% already points to the `Roaming` directory

https://ss64.com/nt/syntax-variables.html

rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website