If you used GNU Arch some time and then decided to move to Subversion, for example, this tip for you. To delete all files and directories related with Arch run a following command in the your project tree:
find . \( -name "{arch}" -o -name ".arch-ids" -o -name ".arch-inventory" \) -print0 | xargs -0 rm -rf
After that it’ll be like new one 🙂
And all your development history is lost…
If it isn’t needed why not