Lately I did wanted to remove efficiently all .svn folders (yes..from svn) inside a project with tones of folders and sub folders.
Here under is the command I used. But before trying it, be sure to be in the right root folder from where you want to remove the .svn folders. The trick here is to use a “find” result in a remove recursively command.
Et voilà !
rm -rf `find . -type d -name .svn`